IPWorks 2022 .NET Edition
Version 22.0 [Build 8369]

FTP Component

Properties   Methods   Events   Config Settings   Errors  

The FTP Component can be used to transfer files to and from FTP servers using the FTP protocol.

Syntax

nsoftware.IPWorks.Ftp

Remarks

The FTP Component supports both plaintext and Secure Sockets Layer/Transport Layer Security (SSL/TLS) connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL related settings are also supported via the Config method.

The FTP Component implements a standard FTP client as specified in RFC 959 and RFC 1579 with the added option of SSL security (RFC 2228) in both the protocol and data channels.

The first step in using the component is specifying the RemoteHost, User and Password. The file to upload to or download from is given by the RemoteFile property. The file to download to or upload from is specified by LocalFile. The current path in the server is set by calling ChangeRemotePath. The Passive property is especially useful if the client is behind a firewall, which inhibits incoming connections to higher ports.

If LocalFile is set to something other than an empty string, then files are received in LocalFile, and otherwise data are received through the Transfer event. StartTransfer and EndTransfer are fired at the beginning and end of transmission.

The PITrail event traces the interaction between the client and the server (the FTP protocol interface connection).

Directory listings are received through the DirList event.

Property List


The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

AccountThe property includes the user account needed to log in.
Command*This property is deprecated. Please use the SendCommand method instead.
ConnectedThis shows whether the component is connected.
DirListThis is a collection of entries resulting in the last directory listing.
FileExists*This property is deprecated. Please use the CheckFileExists method instead.
FileSize*This property is deprecated. Please use the QueryFileSize method instead.
FileTime*This property is deprecated. Please use the QueryFileTime method instead.
FirewallA set of properties related to firewall access.
IdleThe current status of the component.
LastReplyThe last reply from the server.
LocalFileThis is the path to a local file for download or upload. If the file exists, it is overwritten.
LocalHostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
OverwriteThis indicates whether or not the component should overwrite files during transfer.
PassiveThis controls whether or not to direct the server into a passive mode. It is recommended if behind a firewall.
PasswordThis is the password used to log in.
RemoteFileThis is the name of the remote file for uploading, downloading, and performing other operations.
RemoteHostThis is the domain name or IP address of the FTP server.
RemotePath*This property is deprecated. Please use the QueryRemotePath method or the ChangeRemotePath method instead.
RemotePortThis is the port for the FTP service (default is 21).
SSLAcceptServerCertInstructs the component to unconditionally accept the server certificate that matches the supplied certificate.
SSLCertThe certificate to be used during SSL negotiation.
SSLEnabledWhether TLS/SSL is enabled.
SSLProviderThis specifies the SSL/TLS implementation to use.
SSLServerCertThe server certificate for the last established connection.
SSLStartModeDetermines how the component starts the SSL negotiation.
StartByteThis is the byte index in RemoteFile and LocalFile from which to start a transmission.
TimeoutA timeout for the component.
TransferModeThis property includes the transfer mode (ASCII or binary). If the value is 0 (default), the initial server mode will be used.
UserThis property contains the user identifier to use to log in.

Method List


The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

AbortThe method aborts the current upload or download.
AppendThis method appends data from LocalFile to a RemoteFile on an FTP server.
ChangeRemotePathThis method changes the current path on the FTP server.
ChangeTransferModeThis method changes the transfer mode for the current connection.
CheckFileExistsThis method returns True if the file specified by RemoteFile exists on the server.
ConfigSets or retrieves a configuration setting.
ConnectThis method connects to the FTP server without logging in.
DeleteFileThis method removes a file specified by FileName from an FTP server.
DisconnectThis method disconnects from the server without first logging off.
DoEventsProcesses events from the internal message queue.
DownloadThis method downloads a RemoteFile from an FTP server.
InterruptInterrupt the current method.
ListDirectoryList the current directory specified by ChangeRemotePath on an FTP server.
ListDirectoryLongThis method lists extended directory information for the remote path specified by calling ChangeRemotePath .
LogoffThis method is used to log off from the FTP server by posting a QUIT command.
LogonThis method is used to log on to the FTP RemoteHost using the current User and Password .
MakeDirectoryThis method is used to create a directory on the FTP server.
QueryFileSizeThis returns the size of the file specified by RemoteFile .
QueryFileTimeThis returns the modified time of the file specified by RemoteFile .
QueryRemotePathThis queries the server for the current path.
RemoveDirectoryThis removes a directory specified by DirName from an FTP server.
RenameFileThis changes the name of RemoteFile to NewName .
ResetReset the component.
SendCommandSends the exact command directly to the server.
SetDownloadStreamThis method sets the stream to which the downloaded data from the server will be written.
SetUploadStreamThis method sets the stream from which the component will read data to upload to the server.
StoreUniqueThis method uploads a file with a unique name to an FTP server.
UploadThis method uploads a file specified by LocalFile to an FTP server.

Event List


The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

ConnectionStatusThis event is fired to indicate changes in the connection state.
DirListThis event is fired when a directory entry is received.
EndTransferThis event is fired when a file finishes downloading or uploading.
ErrorInformation about errors during data delivery.
PITrailThis event traces the commands sent to the server, and the respective replies.
SSLServerAuthenticationFired after the server presents its certificate to the client.
SSLStatusShows the progress of the secure connection.
StartTransferThis event fires when a file starts downloading or uploading.
TransferThis event is fired during the file download or upload.

Config Settings


The following is a list of config settings for the component with short descriptions. Click on the links for further details.

ActiveModeIPAllows the specification of the IP address that the server will connect to for active mode connections.
ActiveModePORTAddressAllows the specification of the PORT address value for active mode connections.
AppendToLocalFileAppend downloaded files to a local file.
ApplyFileMaskLocallyWhether to filter the directory listing locally or on the server.
AutoSelectDataIPAutomatically select the data connection IP.
CalculatePercentDoneEnables or Disables calculating the percent complete for downloads.
CheckTotalEntryWhether to ignore directory listing total lines.
DILingerWhen set to True, DI connections are terminated gracefully.
DILingerTimeTime in seconds to have the DI connection linger.
DirEntryPatternAllows the use of regular expressions to parse non-standard directory entry formats.
FileTimeFormatThe format of file time reported by the server.
IgnoreEntriesDirectory entry data to ignore.
MaskSensitiveMasks passwords in logs.
MaxDirEntriesInstructs component to save the amount of entries specified that are returned by the server after a ListDirectory call has been made.
ModeZCompressionLevelUsed to specify the level of compression used.
PortRangeAllows the specification of a port range where the component listens for active mode connections.
PreserveFileTimeAttempts to preserve timestamps when transferring files.
RealTimeUploadEnables real time uploading.
RealTimeUploadAgeLimitThe age limit in seconds when using RealTimeUpload.
ReusePISSLSessionInDIWhether the PI SSL session will be reused for the DI connection.
ReuseSSLSessionInDIWhether the SSL session will be reused for the DI connection.
UseClearChannelAllows for the Clear Command Channel (CCC) command.
UseClearDataChannelAllows for the PROT C command.
UseEPSVAllows extended passive mode.
UseMLSDUses listings for machine processing.
UseMLSTUses single file listing for machine processing.
UseModeZAllows compression to be used when transferring data.
UseOldAUTHSSLAllows use of the 'AUTH SSL' command instead of 'AUTH TLS'.
UseProtWhenImplicitSends the PROT P command to the server.
UseRemoteHostAddressForPassiveInstructs the component to use the address specified by RemoteHost when establishing a data connection.
VirtualHostNameSends the HOST command to the server.
CloseStreamAfterTransferIf true, the component will close the upload or download stream after the transfer.
ConnectionTimeoutSets a separate timeout value for establishing a connection.
FirewallAutoDetectTells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHostName or IP address of firewall (optional).
FirewallListenerIf true, the component binds to a SOCKS firewall as a server (TCPClient only).
FirewallPasswordPassword to be used if authentication is to be used when connecting through the firewall.
FirewallPortThe TCP port for the FirewallHost;.
FirewallTypeDetermines the type of firewall to connect through.
FirewallUserA user name if authentication is to be used connecting through a firewall.
KeepAliveIntervalThe retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
KeepAliveTimeThe inactivity time in milliseconds before a TCP keep-alive packet is sent.
LingerWhen set to True, connections are terminated gracefully.
LingerTimeTime in seconds to have the connection linger.
LocalHostThe name of the local host through which connections are initiated or accepted.
LocalPortThe port in the local host where the component binds.
MaxLineLengthThe maximum amount of data to accumulate when no EOL is found.
MaxTransferRateThe transfer rate limit in bytes per second.
ProxyExceptionsListA semicolon separated list of hosts and IPs to bypass when using a proxy.
TCPKeepAliveDetermines whether or not the keep alive socket option is enabled.
TcpNoDelayWhether or not to delay when sending packets.
UseIPv6Whether to use IPv6.
UseNTLMv2Whether to use NTLM V2.
CACertFilePathsThe paths to CA certificate files when using Mono on Unix/Linux.
LogSSLPacketsControls whether SSL packets are logged when using the internal security API.
ReuseSSLSessionDetermines if the SSL session is reused.
SSLCACertsA newline separated list of CA certificate to use during SSL client authentication.
SSLCheckCRLWhether to check the Certificate Revocation List for the server certificate.
SSLCipherStrengthThe minimum cipher strength used for bulk encryption.
SSLEnabledCipherSuitesThe cipher suite to be used in an SSL negotiation.
SSLEnabledProtocolsUsed to enable/disable the supported security protocols.
SSLEnableRenegotiationWhether the renegotiation_info SSL extension is supported.
SSLIncludeCertChainWhether the entire certificate chain is included in the SSLServerAuthentication event.
SSLKeyLogFileThe location of a file where per-session secrets are written for debugging purposes.
SSLNegotiatedCipherReturns the negotiated ciphersuite.
SSLNegotiatedCipherStrengthReturns the negotiated ciphersuite strength.
SSLNegotiatedCipherSuiteReturns the negotiated ciphersuite.
SSLNegotiatedKeyExchangeReturns the negotiated key exchange algorithm.
SSLNegotiatedKeyExchangeStrengthReturns the negotiated key exchange algorithm strength.
SSLNegotiatedVersionReturns the negotiated protocol version.
SSLSecurityFlagsFlags that control certificate verification.
SSLServerCACertsA newline separated list of CA certificate to use during SSL server certificate validation.
TLS12SignatureAlgorithmsDefines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.
TLS12SupportedGroupsThe supported groups for ECC.
TLS13KeyShareGroupsThe groups for which to pregenerate key shares.
TLS13SignatureAlgorithmsThe allowed certificate signature algorithms.
TLS13SupportedGroupsThe supported groups for (EC)DHE key exchange.
AbsoluteTimeoutDetermines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallDataUsed to send extra data to the firewall.
InBufferSizeThe size in bytes of the incoming queue of the socket.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.
BuildInfoInformation about the product's build.
GUIAvailableTells the component whether or not a message loop is available for processing events.
LicenseInfoInformation about the current license.
UseInternalSecurityAPITells the component whether or not to use the system security libraries or an internal implementation.

Account Property (FTP Component)

The property includes the user account needed to log in.

Syntax

public string Account { get; set; }
Public Property Account As String

Default Value

""

Remarks

This property contains the user account to use when logging in. Some servers may require an Account to Logon or to access specific privileges, such as uploading or deleting files.

Command Property (FTP Component)

Used to send additional commands directly to the server.

Syntax

public string Command { set; }
Public WriteOnly Property Command As String

Default Value

""

Remarks

This property can be used to send additional commands directly to the server. Check the LastReply property and/or trap the PITrail events coming from the server to get the response.

This property is write-only and not available at design time.

Connected Property (FTP Component)

This shows whether the component is connected.

Syntax

public bool Connected { get; set; }
Public Property Connected As Boolean

Default Value

False

Remarks

This property is used to determine whether or not the component is connected to the remote host.

Note: It is recommended to use the Connect or Disconnect method instead of setting this property.

This property is not available at design time.

DirList Property (FTP Component)

This is a collection of entries resulting in the last directory listing.

Syntax

public DirEntryList DirList { get; }
Public ReadOnly Property DirList As DirEntryList

Remarks

This property contains the collection of entries resulting in the last directory listing. A collection is returned after a response is received from the server after a call to either ListDirectory or ListDirectoryLong. The collection is made up of entries for each listing in the current directory, which is set by calling ChangeRemotePath.

MaxDirEntries can be used to control the number of directory listings saved.

This collection is indexed from 0 to count -1.

This property is read-only and not available at design time.

FileExists Property (FTP Component)

This property returns True if the file specified by RemoteFile exists on the remote server.

Syntax

public bool FileExists { get; }
Public ReadOnly Property FileExists As Boolean

Default Value

False

Remarks

This property returns True if the file exists on the remote server. It returns False if the file does not exist. You must specify the file you wish to check by setting the RemoteFile before calling this method.

If the component is busy or is not connected, 0 is returned.

If no FTP session is in place, one is automatically created by first calling the Logon method.

This property is read-only and not available at design time.

FileSize Property (FTP Component)

This is the size of the file pointed to by RemoteFile .

Syntax

public long FileSize { get; }
Public ReadOnly Property FileSize As Long

Default Value

0

Remarks

When this property is read, the FTP server is queried for the file size, and the response is provided as the property value.

If the component is busy or is not connected, 0 is returned.

This property is read-only and not available at design time.

FileTime Property (FTP Component)

This is the last modification time of the file pointed to by RemoteFile .

Syntax

public string FileTime { get; }
Public ReadOnly Property FileTime As String

Default Value

""

Remarks

When this property is read, the FTP server is queried for the file modification time, and the response is provided as the property value. The time will be converted to the local time zone.

If the component is busy or is not connected, an empty string is returned.

This property is read-only and not available at design time.

Firewall Property (FTP Component)

A set of properties related to firewall access.

Syntax

public Firewall Firewall { get; set; }
Public Property Firewall As Firewall

Remarks

This is a Firewall type property which contains fields describing the firewall through which the component will attempt to connect.

Idle Property (FTP Component)

The current status of the component.

Syntax

public bool Idle { get; }
Public ReadOnly Property Idle As Boolean

Default Value

True

Remarks

Idle will be False if the component is currently busy (communicating and/or waiting for an answer), and True at all other times.

This property is read-only.

LastReply Property (FTP Component)

The last reply from the server.

Syntax

public string LastReply { get; }
Public ReadOnly Property LastReply As String

Default Value

""

Remarks

This property indicates the last reply received from the server. It can be used for informational purposes. The same information and more can also be retrieved through the PITrail event.

This property is read-only.

LocalFile Property (FTP Component)

This is the path to a local file for download or upload. If the file exists, it is overwritten.

Syntax

public string LocalFile { get; set; }
Public Property LocalFile As String

Default Value

""

Remarks

This property is used by the Upload and Download methods to specify the path to a local file to be downloaded or uploaded. See the method descriptions for more information.

Example (Setting LocalFile)

FTPControl.LocalFile = "C:\localfile.txt" FTPControl.RemoteFile = "remotefile.txt" FTPControl.Download() FTPControl.LocalFile = "C:\localfile2.txt" FTPControl.RemoteFile = "folder/remotefile2.txt" FTPControl.Download()

LocalHost Property (FTP Component)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

public string LocalHost { get; set; }
Public Property LocalHost As String

Default Value

""

Remarks

The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface.

If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

Overwrite Property (FTP Component)

This indicates whether or not the component should overwrite files during transfer.

Syntax

public bool Overwrite { get; set; }
Public Property Overwrite As Boolean

Default Value

False

Remarks

This property is a value indicating whether or not the component should overwrite downloaded files. If Overwrite is False, an error will be thrown whenever LocalFile exists before a download operation.

Passive Property (FTP Component)

This controls whether or not to direct the server into a passive mode. It is recommended if behind a firewall.

Syntax

public bool Passive { get; set; }
Public Property Passive As Boolean

Default Value

True

Remarks

This property controls whether or not to direct the server into a passive mode. Many firewalls will not allow the FTP server to open a connection from outside to the higher ports where the FTP client component expects them to be. If Passive is set to TRUE, the component will use the PASV command instead of the PORT command and thus will direct the server into a passive mode: connections are initiated only by the client.

Password Property (FTP Component)

This is the password used to log in.

Syntax

public string Password { get; set; }
Public Property Password As String

Default Value

""

Remarks

This property contains the password used to log in. It must be set before the component connects to the FTP server.

RemoteFile Property (FTP Component)

This is the name of the remote file for uploading, downloading, and performing other operations.

Syntax

public string RemoteFile { get; set; }
Public Property RemoteFile As String

Default Value

""

Remarks

This property contains the name of the remote file to be uploaded or downloaded and is either an absolute file path or a relative path based on the remote path set by calling ChangeRemotePath.

A number of methods use RemoteFile as an argument.

Example 1. Setting RemoteFile:

FTPControl.LocalFile = "C:\localfile.txt" FTPControl.RemoteFile = "remotefile.txt" FTPControl.Download() FTPControl.LocalFile = "C:\localfile2.txt" FTPControl.RemoteFile = "folder/remotefile2.txt" FTPControl.Download()

Note: As long as file masks are supported by the server, then this property will act as a file mask when performing ListDirectory or ListDirectoryLong. If not supported, then ApplyFileMaskLocally could be set to True to filter the results locally.

Example 2. Using RemoteFile as a file mask: FTPControl.RemoteFile = "*.txt" FTPControl.ListDirectory()

The following special characters are supported for pattern matching:

? Any single character.
* Any characters or no characters (e.g., C*t matches Cat, Cot, Coast, Ct).
[,-] A range of characters (e.g., [a-z], [a], [0-9], [0-9,a-d,f,r-z]).
\ The slash is ignored and exact matching is performed on the next character.

If these characters need to be used as a literal in a pattern, then they must be escaped by surrounding them with brackets []. Note: "]" and "-" do not need to be escaped. See below for the escape sequences:

CharacterEscape Sequence
? [?]
* [*]
[ [[]
\ [\]

For example, to match the value [Something].txt, specify the pattern [[]Something].txt.

RemoteHost Property (FTP Component)

This is the domain name or IP address of the FTP server.

Syntax

public string RemoteHost { get; set; }
Public Property RemoteHost As String

Default Value

""

Remarks

This property specifies the IP address (IP number in dotted internet format) or the domain name of the FTP server. It is set before a connection is attempted and cannot be changed once a connection is in progress.

If this property is set to a domain name, a DNS request is initiated and upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, an error is returned.

If the component is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.

RemotePath Property (FTP Component)

This is the current path in the FTP server.

Syntax

public string RemotePath { get; set; }
Public Property RemotePath As String

Default Value

""

Remarks

This property shows the current working directory on the FTP server. It also can be used to change the working directory by setting it to an absolute directory path, or a relative path with respect to the existing value of this property.

If the first two bytes of the new path are "..", then a change to one level higher in the directory tree is performed.

Setting this property causes the component to send the appropriate command to the remote server only if it is connected.

Example 1. Changing Directory:

FTPControl.Logon() FTPControl.RemotePath = "/home/user"

RemotePort Property (FTP Component)

This is the port for the FTP service (default is 21).

Syntax

public int RemotePort { get; set; }
Public Property RemotePort As Integer

Default Value

21

Remarks

This property contains the port for the FTP service, which defaults to 21 if not set. A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

For an implicit Secure Sockets Layer (SSL), use port 990 (please see the SSLStartMode property for more information).

This property is not available at design time.

SSLAcceptServerCert Property (FTP Component)

Instructs the component to unconditionally accept the server certificate that matches the supplied certificate.

Syntax

public Certificate SSLAcceptServerCert { get; set; }
Public Property SSLAcceptServerCert As Certificate

Remarks

If it finds any issues with the certificate presented by the server, the component will normally terminate the connection with an error.

You may override this behavior by supplying a value for SSLAcceptServerCert. If the certificate supplied in SSLAcceptServerCert is the same as the certificate presented by the server, then the server certificate is accepted unconditionally, and the connection will continue normally.

Please note that this functionality is provided only for cases where you otherwise know that you are communicating with the right server. If used improperly, this property may create a security breach. Use it at your own risk.

SSLCert Property (FTP Component)

The certificate to be used during SSL negotiation.

Syntax

public Certificate SSLCert { get; set; }
Public Property SSLCert As Certificate

Remarks

The digital certificate that the component will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the Encoded field to the encoded certificate. To select a certificate, use the store and subject fields.

SSLEnabled Property (FTP Component)

Whether TLS/SSL is enabled.

Syntax

public bool SSLEnabled { get; set; }
Public Property SSLEnabled As Boolean

Default Value

False

Remarks

This setting specifies whether TLS/SSL is enabled in the component. When False (default) the component operates in plaintext mode. When True TLS/SSL is enabled.

TLS/SSL may also be enabled by setting SSLStartMode. Setting SSLStartMode will automatically update this property value.

This property is not available at design time.

SSLProvider Property (FTP Component)

This specifies the SSL/TLS implementation to use.

Syntax

public FtpSSLProviders SSLProvider { get; set; }

enum FtpSSLProviders { sslpAutomatic, sslpPlatform, sslpInternal }
Public Property SSLProvider As FtpSSLProviders

Enum FtpSSLProviders sslpAutomatic sslpPlatform sslpInternal End Enum

Default Value

0

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the component will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:

0 (sslpAutomatic - default)Automatically selects the appropriate implementation.
1 (sslpPlatform) Uses the platform/system implementation.
2 (sslpInternal) Uses the internal implementation.

Additional Notes

In most cases using the default value (Automatic) is recommended. The component will select a provider depending on the current platform.

When Automatic is selected, on Windows the component will use the platform implementation. On Linux/macOS the component will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used on all platforms.

The async library does not support the platform implementation on Linux or macOS and will use the internal provider on those platforms.

The .NET Standard library will always use the internal implementation on all platforms.

SSLServerCert Property (FTP Component)

The server certificate for the last established connection.

Syntax

public Certificate SSLServerCert { get; }
Public ReadOnly Property SSLServerCert As Certificate

Remarks

SSLServerCert contains the server certificate for the last established connection.

SSLServerCert is reset every time a new connection is attempted.

This property is read-only.

SSLStartMode Property (FTP Component)

Determines how the component starts the SSL negotiation.

Syntax

public FtpSSLStartModes SSLStartMode { get; set; }

enum FtpSSLStartModes { sslAutomatic, sslImplicit, sslExplicit, sslNone }
Public Property SSLStartMode As FtpSSLStartModes

Enum FtpSSLStartModes sslAutomatic sslImplicit sslExplicit sslNone End Enum

Default Value

3

Remarks

The SSLStartMode property may have one of the following values:

0 (sslAutomatic)If the remote port is set to the standard plaintext port of the protocol (where applicable), the component will behave the same as if SSLStartMode is set to sslExplicit. In all other cases, SSL negotiation will be implicit (sslImplicit).
1 (sslImplicit)The SSL negotiation will start immediately after the connection is established.
2 (sslExplicit)The component will first connect in plaintext, and then explicitly start SSL negotiation through a protocol command such as STARTTLS.
3 (sslNone - default)No SSL negotiation, no SSL security. All communication will be in plaintext mode.

StartByte Property (FTP Component)

This is the byte index in RemoteFile and LocalFile from which to start a transmission.

Syntax

public string StartByte { get; set; }
Public Property StartByte As String

Default Value

"0"

Remarks

This property contains a zero-based index in both RemoteFile and LocalFile that determines the point from which the transmission of data begins. This is useful for resuming interrupted downloads and uploads of files from FTP servers.

Once set, the StartByte index is used for all future downloads and uploads. The property must be reset to "0" for normal downloads and uploads.

The type of the property is a string instead of numeric value to allow for certain implementations that expect an alphanumeric marker for the start index.

In the Transfer event, the TransferredBytes parameter will include the bytes skipped (i.e., it will show StartByte more bytes than actually transferred).

Note: Some FTP servers may not support the FTP REST command. If that is the case with the server you are accessing, you will not be able to use the StartByte property.

This property is not available at design time.

Timeout Property (FTP Component)

A timeout for the component.

Syntax

public int Timeout { get; set; }
Public Property Timeout As Integer

Default Value

60

Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the component will wait for the operation to complete before returning control.

The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If Timeout expires, and the operation is not yet complete, the component throws an exception.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

TransferMode Property (FTP Component)

This property includes the transfer mode (ASCII or binary). If the value is 0 (default), the initial server mode will be used.

Syntax

public FtpTransferModes TransferMode { get; set; }

enum FtpTransferModes { tmDefault, tmASCII, tmBinary }
Public Property TransferMode As FtpTransferModes

Enum FtpTransferModes tmDefault tmASCII tmBinary End Enum

Default Value

0

Remarks

This property specifies the transfer mode, which is either ASCII or binary. The valid options for the TransferMode property are as follows:

tmDefault (0) The initial mode of the FTP server is taken. No change.
tmASCII (1) Files are transferred in ASCII mode (a TYPE A command).
tmBinary (2) Files are transferred in binary mode (a TYPE I command).

Note: It is recommended to use the ChangeTransferMode method instead of setting this property.

User Property (FTP Component)

This property contains the user identifier to use to log in.

Syntax

public string User { get; set; }
Public Property User As String

Default Value

""

Remarks

This property contains the user identifier to be used when logging in. It must be set before the component connects to the FTP server.

Abort Method (FTP Component)

The method aborts the current upload or download.

Syntax

public void Abort();

Async Version
public async Task Abort();
public async Task Abort(CancellationToken cancellationToken);
Public Sub Abort()

Async Version
Public Sub Abort() As Task
Public Sub Abort(cancellationToken As CancellationToken) As Task

Remarks

This method sends an ABOR command to the FTP server. It is used to interrupt file uploads and downloads.

Append Method (FTP Component)

This method appends data from LocalFile to a RemoteFile on an FTP server.

Syntax

public void Append();

Async Version
public async Task Append();
public async Task Append(CancellationToken cancellationToken);
Public Sub Append()

Async Version
Public Sub Append() As Task
Public Sub Append(cancellationToken As CancellationToken) As Task

Remarks

This method causes the server-data transfer process (DTP) to accept the data transferred through the data connection and to store the data in a file on the server site. If the file specified in the pathname exists on the server site, then the data shall be appended to that file; otherwise, the file specified in the pathname shall be created on the server site. This method is similar to the Upload method, but the local file specified by LocalFile is appended to RemoteFile on the server as opposed to replacing it, as with the Upload method. RemoteFile is either an absolute path on the server, or a path relative to the current path set by ChangeRemotePath. The server will create a file with that name if it doesn't already exist (similar to upload). If no FTP session is in place, one is automatically created by first calling the Logon method.

ChangeRemotePath Method (FTP Component)

This method changes the current path on the FTP server.

Syntax

public void ChangeRemotePath(string remotePath);

Async Version
public async Task ChangeRemotePath(string remotePath);
public async Task ChangeRemotePath(string remotePath, CancellationToken cancellationToken);
Public Sub ChangeRemotePath(ByVal RemotePath As String)

Async Version
Public Sub ChangeRemotePath(ByVal RemotePath As String) As Task
Public Sub ChangeRemotePath(ByVal RemotePath As String, cancellationToken As CancellationToken) As Task

Remarks

This method changes the current path on the FTP server to the specified RemotePath. When called, the component will issue a command to the server to change the directory. The RemotePath parameter may hold an absolute or relative path.

Absolute Paths

If the path begins with a /, it is considered an absolute path and must specify the entire path from the root of the server. For instance:

component.ChangeRemotePath("/home/testuser/myfolder");

Relative Paths

If the path does not begin with a /, it is considered a relative path and is resolved in relation to the current directory. For instance, a value of myfolder will indicate a subfolder of the current directory. The special value .. refers to the parent directory of the current path. For instance:

//Change to the 'myfolder' sub-directory component.ChangeRemotePath("myfolder"); //Navigate up two levels and then into the 'another/folder' path. component.ChangeRemotePath("../../another/folder");

ChangeTransferMode Method (FTP Component)

This method changes the transfer mode for the current connection.

Syntax

public void ChangeTransferMode(int transferMode);

Async Version
public async Task ChangeTransferMode(int transferMode);
public async Task ChangeTransferMode(int transferMode, CancellationToken cancellationToken);
Public Sub ChangeTransferMode(ByVal TransferMode As Integer)

Async Version
Public Sub ChangeTransferMode(ByVal TransferMode As Integer) As Task
Public Sub ChangeTransferMode(ByVal TransferMode As Integer, cancellationToken As CancellationToken) As Task

Remarks

This method optionally changes the transfer mode used for the connection. The TransferMode parameter indicates the new transfer mode to be used.

In many cases, it is not necessary to explicitly change the transfer mode; however, the binary transfer mode is useful to ensure that files are preserved byte-for-byte during the transfer. For instance, when uploading or downloading images or archives, the binary transfer mode will ensure that no line-ending transformations are performed by the server before data are transmitted.

Valid values for the TransferMode parameter are as follows:

0 (Default) Files are transferred using the default mode of the FTP server.
1 (ASCII) Files are transferred in ASCII mode (sends the command "TYPE A").
2 (Binary) Files are transferred in Binary mode (sends the command "TYPE I").

CheckFileExists Method (FTP Component)

This method returns True if the file specified by RemoteFile exists on the server.

Syntax

public bool CheckFileExists();

Async Version
public async Task<bool> CheckFileExists();
public async Task<bool> CheckFileExists(CancellationToken cancellationToken);
Public Function CheckFileExists() As Boolean

Async Version
Public Function CheckFileExists() As Task(Of Boolean)
Public Function CheckFileExists(cancellationToken As CancellationToken) As Task(Of Boolean)

Remarks

This method sends a command to the server to determine if the file specified by RemoteFile exists. If the file exists, this method returns true, otherwise it returns false. RemoteFile must be specified before calling this method. For instance: component.ChangeRemotePath("/home/testuser/myfolder"); component.RemoteFile = "test.txt"; if(component.CheckFileExists()) { //Do something }

Config Method (FTP Component)

Sets or retrieves a configuration setting.

Syntax

public string Config(string configurationString);

Async Version
public async Task<string> Config(string configurationString);
public async Task<string> Config(string configurationString, CancellationToken cancellationToken);
Public Function Config(ByVal ConfigurationString As String) As String

Async Version
Public Function Config(ByVal ConfigurationString As String) As Task(Of String)
Public Function Config(ByVal ConfigurationString As String, cancellationToken As CancellationToken) As Task(Of String)

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Connect Method (FTP Component)

This method connects to the FTP server without logging in.

Syntax

public void Connect();

Async Version
public async Task Connect();
public async Task Connect(CancellationToken cancellationToken);
Public Sub Connect()

Async Version
Public Sub Connect() As Task
Public Sub Connect(cancellationToken As CancellationToken) As Task

Remarks

This method establishes a connection with the RemoteHost but does not log in. In most cases, it is recommended to use the Logon method, which will both establish a connection and log in to the server.

This method may be useful in cases in which it is desirable to separate the connection and logon operations, for instance, confirming that a host is available by first creating the connection.

DeleteFile Method (FTP Component)

This method removes a file specified by FileName from an FTP server.

Syntax

public void DeleteFile(string fileName);

Async Version
public async Task DeleteFile(string fileName);
public async Task DeleteFile(string fileName, CancellationToken cancellationToken);
Public Sub DeleteFile(ByVal FileName As String)

Async Version
Public Sub DeleteFile(ByVal FileName As String) As Task
Public Sub DeleteFile(ByVal FileName As String, cancellationToken As CancellationToken) As Task

Remarks

This method is used to remove a file specified by FileName from an FTP server. The remote file or directory specified by FileName is deleted. FileName is either an absolute path on the server, or a path relative to remote path set by ChangeRemotePath. If no FTP session is in place, one is automatically created by first calling the Logon method.

Disconnect Method (FTP Component)

This method disconnects from the server without first logging off.

Syntax

public void Disconnect();

Async Version
public async Task Disconnect();
public async Task Disconnect(CancellationToken cancellationToken);
Public Sub Disconnect()

Async Version
Public Sub Disconnect() As Task
Public Sub Disconnect(cancellationToken As CancellationToken) As Task

Remarks

This method immediately disconnects from the server without first logging off.

In most cases, the Logoff method should be used to log off and disconnect from the server. Call the Disconnect method in cases in which it is desirable to immediately disconnect without first logging off.

DoEvents Method (FTP Component)

Processes events from the internal message queue.

Syntax

public void DoEvents();

Async Version
public async Task DoEvents();
public async Task DoEvents(CancellationToken cancellationToken);
Public Sub DoEvents()

Async Version
Public Sub DoEvents() As Task
Public Sub DoEvents(cancellationToken As CancellationToken) As Task

Remarks

When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Download Method (FTP Component)

This method downloads a RemoteFile from an FTP server.

Syntax

public void Download();

Async Version
public async Task Download();
public async Task Download(CancellationToken cancellationToken);
Public Sub Download()

Async Version
Public Sub Download() As Task
Public Sub Download(cancellationToken As CancellationToken) As Task

Remarks

This method is used to download the remote file specified by RemoteFile to the local file specified by LocalFile, or it is retrieved through the Transfer event if the LocalFile property is "" (empty string). RemoteFile is either an absolute path on the server or a path relative to a remote path set by calling ChangeRemotePath. If no FTP session is in place, one is automatically created by first calling the Logon method.

Example (Download a File)

FTPControl.LocalFile = "C:\localfile.txt" FTPControl.RemoteFile = "remotefile.txt" FTPControl.Download() FTPControl.LocalFile = "C:\localfile2.txt" FTPControl.RemoteFile = "folder/remotefile2.txt" FTPControl.Download()

Interrupt Method (FTP Component)

Interrupt the current method.

Syntax

public void Interrupt();

Async Version
public async Task Interrupt();
public async Task Interrupt(CancellationToken cancellationToken);
Public Sub Interrupt()

Async Version
Public Sub Interrupt() As Task
Public Sub Interrupt(cancellationToken As CancellationToken) As Task

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

ListDirectory Method (FTP Component)

List the current directory specified by ChangeRemotePath on an FTP server.

Syntax

public void ListDirectory();

Async Version
public async Task ListDirectory();
public async Task ListDirectory(CancellationToken cancellationToken);
Public Sub ListDirectory()

Async Version
Public Sub ListDirectory() As Task
Public Sub ListDirectory(cancellationToken As CancellationToken) As Task

Remarks

This method is used to list the directory (or file mask) specified in RemoteFile. RemoteFile is either an absolute path on the server, or a path relative to the remote path set by ChangeRemotePath. The file listing is received through the DirList event.

Similar to ListDirectoryLong, except that only file names are returned.

Note: Because RemoteFile acts as a file mask, to retrieve a complete directory listing RemoteFile should be set to an empty string or a mask like "*". If no FTP session is in place, one is automatically created by first calling the Logon method.

ListDirectoryLong Method (FTP Component)

This method lists extended directory information for the remote path specified by calling ChangeRemotePath .

Syntax

public void ListDirectoryLong();

Async Version
public async Task ListDirectoryLong();
public async Task ListDirectoryLong(CancellationToken cancellationToken);
Public Sub ListDirectoryLong()

Async Version
Public Sub ListDirectoryLong() As Task
Public Sub ListDirectoryLong(cancellationToken As CancellationToken) As Task

Remarks

This method is used to request a directory (or file mask) listing specified in RemoteFile. RemoteFile is either an absolute path on the server, or a path relative to the remote path set by calling ChangeRemotePath. The file listing is received through the DirList event. Extended file information is returned.

Note: Because RemoteFile acts as a file mask, to retrieve a complete directory listing RemoteFile should be set to empty string or a mask like "*". If no FTP session is in place, one is automatically created by first calling the Logon method.

Logoff Method (FTP Component)

This method is used to log off from the FTP server by posting a QUIT command.

Syntax

public void Logoff();

Async Version
public async Task Logoff();
public async Task Logoff(CancellationToken cancellationToken);
Public Sub Logoff()

Async Version
Public Sub Logoff() As Task
Public Sub Logoff(cancellationToken As CancellationToken) As Task

Remarks

This method is used to log off from the FTP server by posting a QUIT command. If that fails, the connection is terminated by the local host.

Logon Method (FTP Component)

This method is used to log on to the FTP RemoteHost using the current User and Password .

Syntax

public void Logon();

Async Version
public async Task Logon();
public async Task Logon(CancellationToken cancellationToken);
Public Sub Logon()

Async Version
Public Sub Logon() As Task
Public Sub Logon(cancellationToken As CancellationToken) As Task

Remarks

This method is used to log on to the FTP server using the current User and Password. If TransferMode is not 0 (Default), then the FTP transfer mode is set to the appropriate value.

Example (Logging On)

FTPControl.RemoteHost = "ftpserver" FTPControl.User = "username" FTPControl.Password = "password" FTPControl.Logon()

MakeDirectory Method (FTP Component)

This method is used to create a directory on the FTP server.

Syntax

public void MakeDirectory(string newDir);

Async Version
public async Task MakeDirectory(string newDir);
public async Task MakeDirectory(string newDir, CancellationToken cancellationToken);
Public Sub MakeDirectory(ByVal NewDir As String)

Async Version
Public Sub MakeDirectory(ByVal NewDir As String) As Task
Public Sub MakeDirectory(ByVal NewDir As String, cancellationToken As CancellationToken) As Task

Remarks

This method is used to create a directory with a path specified by NewDir on the FTP server. NewDir is either an absolute path on the server, or a path relative to the remote path that is set by calling ChangeRemotePath. If no FTP session is in place, one is automatically created by first calling the Logon method.

Note: When MakeDirectory is called, RemoteFile is changed to NewDir.

QueryFileSize Method (FTP Component)

This returns the size of the file specified by RemoteFile .

Syntax

public long QueryFileSize();

Async Version
public async Task<long> QueryFileSize();
public async Task<long> QueryFileSize(CancellationToken cancellationToken);
Public Function QueryFileSize() As Long

Async Version
Public Function QueryFileSize() As Task(Of Long)
Public Function QueryFileSize(cancellationToken As CancellationToken) As Task(Of Long)

Remarks

This method sends the SIZE command to the server to obtain the size (in bytes) of the file specified by RemoteFile. RemoteFile must be specified before calling this method. For instance: component.ChangeRemotePath("/home/testuser/myfolder"); component.RemoteFile = "test.txt"; long myFileSize = component.QueryFileSize();

If RemoteFile does not exist on the server, the component throws an exception.

QueryFileTime Method (FTP Component)

This returns the modified time of the file specified by RemoteFile .

Syntax

public string QueryFileTime();

Async Version
public async Task<string> QueryFileTime();
public async Task<string> QueryFileTime(CancellationToken cancellationToken);
Public Function QueryFileTime() As String

Async Version
Public Function QueryFileTime() As Task(Of String)
Public Function QueryFileTime(cancellationToken As CancellationToken) As Task(Of String)

Remarks

This method sends the MDTM command to the server to obtain the modified time of the file specified by RemoteFile. The time returned by this method will be converted to the local timezone. RemoteFile must be specified before calling this method. For instance: component.ChangeRemotePath("/home/testuser/myfolder"); component.RemoteFile = "test.txt"; string myModifiedTime = component.QueryFileTime();

The FileTimeFormat configuration setting controls the format of the returned value.

QueryRemotePath Method (FTP Component)

This queries the server for the current path.

Syntax

public string QueryRemotePath();

Async Version
public async Task<string> QueryRemotePath();
public async Task<string> QueryRemotePath(CancellationToken cancellationToken);
Public Function QueryRemotePath() As String

Async Version
Public Function QueryRemotePath() As Task(Of String)
Public Function QueryRemotePath(cancellationToken As CancellationToken) As Task(Of String)

Remarks

This method queries the server for the current path. When called, the component will issue a command to the server to retrieve the current path value. The return value of this method is the path returned by the server. For instance:

string remotePath = component.QueryRemotePath();

RemoveDirectory Method (FTP Component)

This removes a directory specified by DirName from an FTP server.

Syntax

public void RemoveDirectory(string dirName);

Async Version
public async Task RemoveDirectory(string dirName);
public async Task RemoveDirectory(string dirName, CancellationToken cancellationToken);
Public Sub RemoveDirectory(ByVal DirName As String)

Async Version
Public Sub RemoveDirectory(ByVal DirName As String) As Task
Public Sub RemoveDirectory(ByVal DirName As String, cancellationToken As CancellationToken) As Task

Remarks

This method is used to remove a directory with path specified by DirName from the FTP server. DirName is either an absolute path on the server, or a path relative to the remote path set by calling ChangeRemotePath. If no FTP session is in place, one is automatically created by first calling the Logon method.

RenameFile Method (FTP Component)

This changes the name of RemoteFile to NewName .

Syntax

public void RenameFile(string newName);

Async Version
public async Task RenameFile(string newName);
public async Task RenameFile(string newName, CancellationToken cancellationToken);
Public Sub RenameFile(ByVal NewName As String)

Async Version
Public Sub RenameFile(ByVal NewName As String) As Task
Public Sub RenameFile(ByVal NewName As String, cancellationToken As CancellationToken) As Task

Remarks

This method is used to change the name of a remote file, specified by RemoteFile to NewName. RemoteFile and NewName are either absolute paths on the server, or a path relative to a remote path set by calling ChangeRemotePath. If no FTP session is in place, one is automatically created by first calling the Logon method.

Reset Method (FTP Component)

Reset the component.

Syntax

public void Reset();

Async Version
public async Task Reset();
public async Task Reset(CancellationToken cancellationToken);
Public Sub Reset()

Async Version
Public Sub Reset() As Task
Public Sub Reset(cancellationToken As CancellationToken) As Task

Remarks

This method will reset the component's properties to their default values.

SendCommand Method (FTP Component)

Sends the exact command directly to the server.

Syntax

public void SendCommand(string command);

Async Version
public async Task SendCommand(string command);
public async Task SendCommand(string command, CancellationToken cancellationToken);
Public Sub SendCommand(ByVal Command As String)

Async Version
Public Sub SendCommand(ByVal Command As String) As Task
Public Sub SendCommand(ByVal Command As String, cancellationToken As CancellationToken) As Task

Remarks

This method sends the command specified by Command to the server exactly as it is provided. Use this method to send additional or custom commands directly to the server.

After calling this method check the LastReply property and/or monitor the PITrail event to obtain the server's response.

SetDownloadStream Method (FTP Component)

This method sets the stream to which the downloaded data from the server will be written.

Syntax

public void SetDownloadStream(System.IO.Stream downloadStream);

Async Version
public async Task SetDownloadStream(System.IO.Stream downloadStream);
public async Task SetDownloadStream(System.IO.Stream downloadStream, CancellationToken cancellationToken);
Public Sub SetDownloadStream(ByVal DownloadStream As System.IO.Stream)

Async Version
Public Sub SetDownloadStream(ByVal DownloadStream As System.IO.Stream) As Task
Public Sub SetDownloadStream(ByVal DownloadStream As System.IO.Stream, cancellationToken As CancellationToken) As Task

Remarks

This method is used to set the stream to which the downloaded data from the server will be written. If a download stream is set before the Download method is called, the downloaded data will be written to the stream. The stream should be open and normally set to position 0. The component will automatically close this stream if CloseStreamAfterTransfer is True (default). If the stream is closed, you need to call SetDownloadStream again before calling Download again. The downloaded content will be written starting at the current position in the stream. If StartByte is a non-zero value, the server will be instructed to skip those bytes before starting to send the content of the file. In that case, it is up to you to build the stream appropriately.

Note: SetDownloadStream and LocalFile will reset the other stream.

SetUploadStream Method (FTP Component)

This method sets the stream from which the component will read data to upload to the server.

Syntax

public void SetUploadStream(System.IO.Stream uploadStream);

Async Version
public async Task SetUploadStream(System.IO.Stream uploadStream);
public async Task SetUploadStream(System.IO.Stream uploadStream, CancellationToken cancellationToken);
Public Sub SetUploadStream(ByVal UploadStream As System.IO.Stream)

Async Version
Public Sub SetUploadStream(ByVal UploadStream As System.IO.Stream) As Task
Public Sub SetUploadStream(ByVal UploadStream As System.IO.Stream, cancellationToken As CancellationToken) As Task

Remarks

This method is used to set the stream from which the component will read data to upload to the server. If an upload stream is set before the Upload method is called, the content of the stream will be read by the component and uploaded to the server. The stream should be open and normally set to position 0. The component will automatically close this stream if CloseStreamAfterTransfer is True (default). If the stream is closed, you need to call SetUploadStream again before calling Upload again. The content of the stream will be read from the current position all the way to the end, and no bytes will be skipped even if StartByte is set to a non-zero value (although the server will be instructed to skip those bytes in its file).

Note: SetUploadStream and LocalFile will reset the other stream.

StoreUnique Method (FTP Component)

This method uploads a file with a unique name to an FTP server.

Syntax

public void StoreUnique();

Async Version
public async Task StoreUnique();
public async Task StoreUnique(CancellationToken cancellationToken);
Public Sub StoreUnique()

Async Version
Public Sub StoreUnique() As Task
Public Sub StoreUnique(cancellationToken As CancellationToken) As Task

Remarks

This method is used to upload a file with a unique name to an FTP server. This is similar to the Upload method, but the server determines a unique name for the LocalFile to be saved on the current directory set by calling ChangeRemotePath. The server includes the new name of the file in its response. The user should check the PITrail event, or LastReply property to retrieve this generated filename.

Upload Method (FTP Component)

This method uploads a file specified by LocalFile to an FTP server.

Syntax

public void Upload();

Async Version
public async Task Upload();
public async Task Upload(CancellationToken cancellationToken);
Public Sub Upload()

Async Version
Public Sub Upload() As Task
Public Sub Upload(cancellationToken As CancellationToken) As Task

Remarks

This method uploads a local file specified by LocalFile to the remote file specified by RemoteFile. RemoteFile is either an absolute path on the server, or a path relative to the remote path set by calling ChangeRemotePath. If no FTP session is in place, one is automatically created by first calling the Logon method.

If you want to append to a server file, please refer to the Append method.

Example 1: Upload a File

FTPControl.LocalFile = "C:\localfile.txt" FTPControl.RemoteFile = "remotefile.txt" FTPControl.Upload() FTPControl.LocalFile = "C:\localfile2.txt" FTPControl.RemoteFile = "folder/remotefile2.txt" FTPControl.Upload()

ConnectionStatus Event (FTP Component)

This event is fired to indicate changes in the connection state.

Syntax

public event OnConnectionStatusHandler OnConnectionStatus;

public delegate void OnConnectionStatusHandler(object sender, FtpConnectionStatusEventArgs e);

public class FtpConnectionStatusEventArgs : EventArgs {
  public string ConnectionEvent { get; }
  public int StatusCode { get; }
  public string Description { get; }
}
Public Event OnConnectionStatus As OnConnectionStatusHandler

Public Delegate Sub OnConnectionStatusHandler(sender As Object, e As FtpConnectionStatusEventArgs)

Public Class FtpConnectionStatusEventArgs Inherits EventArgs
  Public ReadOnly Property ConnectionEvent As String
  Public ReadOnly Property StatusCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The ConnectionStatus event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:

Firewall connection complete.
Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable).
Remote host connection complete.
Remote host disconnected.
SSL or S/Shell connection broken.
Firewall host disconnected.

StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

DirList Event (FTP Component)

This event is fired when a directory entry is received.

Syntax

public event OnDirListHandler OnDirList;

public delegate void OnDirListHandler(object sender, FtpDirListEventArgs e);

public class FtpDirListEventArgs : EventArgs {
  public string DirEntry { get; }
  public string FileName { get; }
  public bool IsDir { get; }
  public long FileSize { get; }
  public string FileTime { get; }
}
Public Event OnDirList As OnDirListHandler

Public Delegate Sub OnDirListHandler(sender As Object, e As FtpDirListEventArgs)

Public Class FtpDirListEventArgs Inherits EventArgs
  Public ReadOnly Property DirEntry As String
  Public ReadOnly Property FileName As String
  Public ReadOnly Property IsDir As Boolean
  Public ReadOnly Property FileSize As Long
  Public ReadOnly Property FileTime As String
End Class

Remarks

The DirList events are fired when a directory listing is received as a response to a ListDirectory or ListDirectoryLong call.

The StartTransfer and EndTransfer events mark the beginning and end of the event stream.

The DirEntry parameter contains the filename when ListDirectory is called and includes extended file information when ListDirectoryLong is called.

The component tries to fill out the FileName, IsDir, FileSize, and FileTime parameters when calling the ListDirectoryLong method. Except for FileName, these parameters are empty when a short "List Directory" is performed.

In Unix systems, the date is given in two types of formats: If the date is in the past 12 months the exact time is specified and the year is omitted. Otherwise, only the date and the year, but not hours or minutes, are given.

EndTransfer Event (FTP Component)

This event is fired when a file finishes downloading or uploading.

Syntax

public event OnEndTransferHandler OnEndTransfer;

public delegate void OnEndTransferHandler(object sender, FtpEndTransferEventArgs e);

public class FtpEndTransferEventArgs : EventArgs {
  public int Direction { get; }
}
Public Event OnEndTransfer As OnEndTransferHandler

Public Delegate Sub OnEndTransferHandler(sender As Object, e As FtpEndTransferEventArgs)

Public Class FtpEndTransferEventArgs Inherits EventArgs
  Public ReadOnly Property Direction As Integer
End Class

Remarks

The EndTransfer event fires when a Data Interface connection is closed. This occurs when the file finishes transferring or a directory listing is finished.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Error Event (FTP Component)

Information about errors during data delivery.

Syntax

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, FtpErrorEventArgs e);

public class FtpErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}
Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As FtpErrorEventArgs)

Public Class FtpErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

PITrail Event (FTP Component)

This event traces the commands sent to the server, and the respective replies.

Syntax

public event OnPITrailHandler OnPITrail;

public delegate void OnPITrailHandler(object sender, FtpPITrailEventArgs e);

public class FtpPITrailEventArgs : EventArgs {
  public int Direction { get; }
  public string Message { get; }
}
Public Event OnPITrail As OnPITrailHandler

Public Delegate Sub OnPITrailHandler(sender As Object, e As FtpPITrailEventArgs)

Public Class FtpPITrailEventArgs Inherits EventArgs
  Public ReadOnly Property Direction As Integer
  Public ReadOnly Property Message As String
End Class

Remarks

The PITrail event is useful for debugging purposes. It shows all of the interactions between the client and the server, line by line.

The Message parameter contains the full text of the message. The Direction parameter shows the originator of the message:

0 (Client)The Message originates from the client.
1 (Server)The Message originates from the server.
2 (Info)The Message is an informative message originating from the client software (the component code).

SSLServerAuthentication Event (FTP Component)

Fired after the server presents its certificate to the client.

Syntax

public event OnSSLServerAuthenticationHandler OnSSLServerAuthentication;

public delegate void OnSSLServerAuthenticationHandler(object sender, FtpSSLServerAuthenticationEventArgs e);

public class FtpSSLServerAuthenticationEventArgs : EventArgs {
  public string CertEncoded { get; }
public byte[] CertEncodedB { get; } public string CertSubject { get; } public string CertIssuer { get; } public string Status { get; } public bool Accept { get; set; } }
Public Event OnSSLServerAuthentication As OnSSLServerAuthenticationHandler

Public Delegate Sub OnSSLServerAuthenticationHandler(sender As Object, e As FtpSSLServerAuthenticationEventArgs)

Public Class FtpSSLServerAuthenticationEventArgs Inherits EventArgs
  Public ReadOnly Property CertEncoded As String
Public ReadOnly Property CertEncodedB As Byte() Public ReadOnly Property CertSubject As String Public ReadOnly Property CertIssuer As String Public ReadOnly Property Status As String Public Property Accept As Boolean End Class

Remarks

This event is where the client can decide whether to continue with the connection process or not. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether to continue or not.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string "OK"). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

SSLStatus Event (FTP Component)

Shows the progress of the secure connection.

Syntax

public event OnSSLStatusHandler OnSSLStatus;

public delegate void OnSSLStatusHandler(object sender, FtpSSLStatusEventArgs e);

public class FtpSSLStatusEventArgs : EventArgs {
  public string Message { get; }
}
Public Event OnSSLStatus As OnSSLStatusHandler

Public Delegate Sub OnSSLStatusHandler(sender As Object, e As FtpSSLStatusEventArgs)

Public Class FtpSSLStatusEventArgs Inherits EventArgs
  Public ReadOnly Property Message As String
End Class

Remarks

The event is fired for informational and logging purposes only. Used to track the progress of the connection.

StartTransfer Event (FTP Component)

This event fires when a file starts downloading or uploading.

Syntax

public event OnStartTransferHandler OnStartTransfer;

public delegate void OnStartTransferHandler(object sender, FtpStartTransferEventArgs e);

public class FtpStartTransferEventArgs : EventArgs {
  public int Direction { get; }
}
Public Event OnStartTransfer As OnStartTransferHandler

Public Delegate Sub OnStartTransferHandler(sender As Object, e As FtpStartTransferEventArgs)

Public Class FtpStartTransferEventArgs Inherits EventArgs
  Public ReadOnly Property Direction As Integer
End Class

Remarks

The StartTransfer event fires when a Data Interface connection is created. This is when the file starts transferring or a directory listing is started.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Transfer Event (FTP Component)

This event is fired during the file download or upload.

Syntax

public event OnTransferHandler OnTransfer;

public delegate void OnTransferHandler(object sender, FtpTransferEventArgs e);

public class FtpTransferEventArgs : EventArgs {
  public int Direction { get; }
  public long BytesTransferred { get; }
  public int PercentDone { get; }
  public string Text { get; }
public byte[] TextB { get; } }
Public Event OnTransfer As OnTransferHandler

Public Delegate Sub OnTransferHandler(sender As Object, e As FtpTransferEventArgs)

Public Class FtpTransferEventArgs Inherits EventArgs
  Public ReadOnly Property Direction As Integer
  Public ReadOnly Property BytesTransferred As Long
  Public ReadOnly Property PercentDone As Integer
  Public ReadOnly Property Text As String
Public ReadOnly Property TextB As Byte() End Class

Remarks

One or more Transfer events are fired during file transfer. The BytesTransferred parameter shows the number of bytes transferred since the beginning of the transfer.

Text contains the portion of the file data being delivered.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.

Certificate Type

This is the digital certificate being used.

Remarks

This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.

Fields

EffectiveDate
String

This is the date on which this certificate becomes valid. Before this date, it is not valid. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

Encoded
String

This is the certificate (PEM/base64 encoded). This field is used to assign a specific certificate. The Store and Subject fields also may be used to specify a certificate.

When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

EncodedB
Byte []

This is the certificate (PEM/base64 encoded). This field is used to assign a specific certificate. The Store and Subject fields also may be used to specify a certificate.

When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

ExpirationDate
String

This is the date the certificate expires. After this date, the certificate will no longer be valid. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

ExtendedKeyUsage
String

This is a comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

Fingerprint
String

This is the hex-encoded, 16-byte MD5 fingerprint of the certificate.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

FingerprintSHA1
String

This is the hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

FingerprintSHA256
String

This is the hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

Issuer
String

This is the issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate.

PrivateKey
String

This is the private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

Note: The PrivateKey may be available but not exportable. In this case, PrivateKey returns an empty string.

PrivateKeyAvailable
Boolean

This field shows whether a PrivateKey is available for the selected certificate. If PrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

PrivateKeyContainer
String

This is the name of the PrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

PublicKey
String

This is the public key of the certificate. The key is provided as PEM/Base64-encoded data.

PublicKeyAlgorithm
String

This field contains the textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

PublicKeyLength
Integer

This is the length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

SerialNumber
String

This is the serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

SignatureAlgorithm
String

The field contains the text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

Store
String

This is the name of the certificate store for the client certificate.

The StoreType field denotes the type of the certificate store specified by Store. If the store is password protected, specify the password in StorePassword.

Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject field for details.

Designations of certificate stores are platform-dependent.

The following are designations of the most common User and Machine certificate stores in Windows:

MYA certificate store holding personal certificates with their associated private keys.
CACertifying authority certificates.
ROOTRoot certificates.

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e. PKCS12 certificate store).

StoreB
Byte []

This is the name of the certificate store for the client certificate.

The StoreType field denotes the type of the certificate store specified by Store. If the store is password protected, specify the password in StorePassword.

Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject field for details.

Designations of certificate stores are platform-dependent.

The following are designations of the most common User and Machine certificate stores in Windows:

MYA certificate store holding personal certificates with their associated private keys.
CACertifying authority certificates.
ROOTRoot certificates.

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e. PKCS12 certificate store).

StorePassword
String

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

StoreType
CertStoreTypes

This is the type of certificate store for this certificate.

The component supports both public and private keys in a variety of formats. When the cstAuto value is used the component will automatically determine the type. This field can take one of the following values:

0 (cstUser - default)For Windows, this specifies that the certificate store is a certificate store owned by the current user. Note: this store type is not available in Java.
1 (cstMachine)For Windows, this specifies that the certificate store is a machine store. Note: this store type is not available in Java.
2 (cstPFXFile)The certificate store is the name of a PFX (PKCS12) file containing certificates.
3 (cstPFXBlob)The certificate store is a string (binary or base64-encoded) representing a certificate store in PFX (PKCS12) format.
4 (cstJKSFile)The certificate store is the name of a Java Key Store (JKS) file containing certificates. Note: this store type is only available in Java.
5 (cstJKSBlob)The certificate store is a string (binary or base64-encoded) representing a certificate store in Java Key Store (JKS) format. Note: this store type is only available in Java.
6 (cstPEMKeyFile)The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate.
7 (cstPEMKeyBlob)The certificate store is a string (binary or base64-encoded) that contains a private key and an optional certificate.
8 (cstPublicKeyFile)The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate.
9 (cstPublicKeyBlob)The certificate store is a string (binary or base64-encoded) that contains a PEM- or DER-encoded public key certificate.
10 (cstSSHPublicKeyBlob)The certificate store is a string (binary or base64-encoded) that contains an SSH-style public key.
11 (cstP7BFile)The certificate store is the name of a PKCS7 file containing certificates.
12 (cstP7BBlob)The certificate store is a string (binary) representing a certificate store in PKCS7 format.
13 (cstSSHPublicKeyFile)The certificate store is the name of a file that contains an SSH-style public key.
14 (cstPPKFile)The certificate store is the name of a file that contains a PPK (PuTTY Private Key).
15 (cstPPKBlob)The certificate store is a string (binary) that contains a PPK (PuTTY Private Key).
16 (cstXMLFile)The certificate store is the name of a file that contains a certificate in XML format.
17 (cstXMLBlob)The certificate store is a string that contains a certificate in XML format.
18 (cstJWKFile)The certificate store is the name of a file that contains a JWK (JSON Web Key).
19 (cstJWKBlob)The certificate store is a string that contains a JWK (JSON Web Key).
20 (cstSecurityKey)The certificate is present on a physical security key accessible via a PKCS11 interface.

To use a security key the necessary data must first be collected using the CertMgr component. The ListStoreCertificates method may be called after setting CertStoreType to cstSecurityKey, CertStorePassword to the PIN, and CertStore to the full path of the PKCS11 dll. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use.

When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN.

Code Example: SSH Authentication with Security Key certmgr.CertStoreType = CertStoreTypes.cstSecurityKey; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; //PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstSecurityKey, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22);

21 (cstBCFKSFile)The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). Note: this store type is only available in Java and .NET.
22 (cstBCFKSBlob)The certificate store is a string (binary or base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. Note: this store type is only available in Java and .NET.
99 (cstAuto)The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically.

Subject
String

This is the subject of the certificate used for client authentication.

This field will be populated with the full subject of the loaded certificate. When loading a certificate the subject is used to locate the certificate in the store.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma separated list of distinguished name fields and values. For instance "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are displayed below.

FieldMeaning
CNCommon Name. This is commonly a host name like www.server.com.
OOrganization
OUOrganizational Unit
LLocality
SState
CCountry
EEmail Address

If a field value contains a comma it must be quoted.

SubjectAltNames
String

This field contains comma-separated lists of alternative subject names for the certificate.

ThumbprintMD5
String

This field contains the MD5 hash of the certificate. If the hash does not already exist, it is computed.

ThumbprintSHA1
String

This field contains the SHA-1 hash of the certificate. If the hash does not already exist, it is computed.

ThumbprintSHA256
String

This field contains the SHA-256 hash of the certificate. If the hash does not already exist, it is computed.

Usage
String

This field contains the text description of UsageFlags.

This value will be of one or more of the following strings and will be separated by commas:

  • Digital Signatures
  • Key Authentication
  • Key Encryption
  • Data Encryption
  • Key Agreement
  • Certificate Signing
  • Key Signing

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

UsageFlags
Integer

This field contains the flags that show intended use for the certificate. The value of UsageFlags is a combination of the following flags:

0x80Digital Signatures
0x40Key Authentication
0x20Key Encryption
0x10Data Encryption
0x08Key Agreement
0x04Certificate Signing
0x02Key Signing

Please see the Usage field for a text representation of UsageFlags.

This functionality currently is not available when the provider is OpenSSL.

Version
String

This field contains the certificate's version number. The possible values are the strings "V1", "V2", and "V3".

Constructors

public Certificate();
Public Certificate()

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

public Certificate( certificateFile);
Public Certificate(ByVal CertificateFile As )

Opens CertificateFile and reads out the contents as an X509 public key.

public Certificate( certificateData);
Public Certificate(ByVal CertificateData As Byte())

Parses CertificateData as an X509 public key.

public Certificate( certStoreType,  store,  storePassword,  subject);
Public Certificate(ByVal CertStoreType As , ByVal Store As , ByVal StorePassword As , ByVal Subject As )

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  subject,  configurationString);
Public Certificate(ByVal CertStoreType As , ByVal Store As , ByVal StorePassword As , ByVal Subject As , ByVal ConfigurationString As )

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. ConfigurationString is a newline separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CyrptoAPI option. The default value is True (the key is persisted). "Thumbprint" - a MD5, SHA1, or SHA256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to cstUser, cstMachine, cstPublicKeyFile, and cstPFXFile store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  encoded);
Public Certificate(ByVal CertStoreType As , ByVal Store As , ByVal StorePassword As , ByVal Encoded As Byte())

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

public Certificate( certStoreType,  storeBlob,  storePassword,  subject);
Public Certificate(ByVal CertStoreType As , ByVal StoreBlob As Byte(), ByVal StorePassword As , ByVal Subject As )

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  subject,  configurationString);
Public Certificate(ByVal CertStoreType As , ByVal StoreBlob As Byte(), ByVal StorePassword As , ByVal Subject As , ByVal ConfigurationString As )

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  encoded);
Public Certificate(ByVal CertStoreType As , ByVal StoreBlob As Byte(), ByVal StorePassword As , ByVal Encoded As Byte())

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or base64-encoded) containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

DirEntry Type

This is a listing in a directory returned from the server.

Remarks

The DirEntry listings are filled out by the component when a directory listing is received as a response to a ListDirectory or ListDirectoryLong call. The server returns a listing for each directory and file at the current path that exists. This listing is parsed into a directory entry.

If ListDirectoryLong is called, all of the fields listed below are supplied by the server. When the ListDirectory method is called, however, the FileSize, FileTime, and IsDir fields all are left empty by the server. In this case, the only field it returns is the FileName.

The full line for the directory entry is provided by the Entry field.

Fields

Entry
String

This field contains the raw entry as received from the server. It is the complete unparsed entry in the directory listing.

FileName
String

This field shows the file name in the last directory listing. This also may be the directory name if a directory is being listed. You can tell whether it is a file or a directory by the Boolean IsDir field.

FileSize
Long

This field shows the file size in the last directory listing.

FileTime
String

This field shows the file time in the last directory listing. This contains the date/time stamp in which the file was created.

Note: In Unix systems, the date is given in two types of formats: If the date is in the past 12 months, the exact time is specified and the year is omitted. Otherwise, only the date and the year, but not hours or minutes, are given.

IsDir
Boolean

This field specifies whether entries in the last directory listing are directories. This Boolean value denotes whether or not the directory entry listed in FileName is a file or a directory.

Constructors

public DirEntry();
Public DirEntry()

Firewall Type

This is the firewall the component will connect through.

Remarks

When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall Host and the FirewallType.

Fields

AutoDetect
Boolean

This field tells the component whether or not to automatically detect and use firewall system settings, if available.

FirewallType
FirewallTypes

This field determines the type of firewall to connect through. The applicable values are as follows:

fwNone (0)No firewall (default setting).
fwTunnel (1)Connect through a tunneling proxy. Port is set to 80.
fwSOCKS4 (2)Connect through a SOCKS4 Proxy. Port is set to 1080.
fwSOCKS5 (3)Connect through a SOCKS5 Proxy. Port is set to 1080.
fwSOCKS4A (10)Connect through a SOCKS4A Proxy. Port is set to 1080.

Host
String

This field contains the name or IP address of firewall (optional). If a Host is given, the requested connections will be authenticated through the specified firewall when connecting.

If this field is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this field is set to the corresponding address. If the search is not successful, the component throws an exception.

Password
String

This field contains a password if authentication is to be used when connecting through the firewall. If Host is specified, the User and Password fields are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception.

Port
Integer

This field contains the transmission control protocol (TCP) port for the firewall Host. See the description of the Host field for details.

Note: This field is set automatically when FirewallType is set to a valid value. See the description of the FirewallType field for details.

User
String

This field contains a user name if authentication is to be used connecting through a firewall. If the Host is specified, this field and Password fields are used to connect and authenticate to the given Firewall. If the authentication fails, the component throws an exception.

Constructors

public Firewall();
Public Firewall()

Config Settings (FTP Component)

The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

FTP Config Settings

ActiveModeIP:   Allows the specification of the IP address that the server will connect to for active mode connections.

The ActiveModeIP configuration setting can be used to specify the IP address that the server will connect to when using an active mode configuration (Passive = False). When this configuration setting is set, the port number where the component listens for active mode connections will still be managed by the component. The PortRange also can be used to ensure that the correct port is used by the client.

Note: This configuration setting will be ignored if ActiveModePORTAddress is also specified.

ActiveModePORTAddress:   Allows the specification of the PORT address value for active mode connections.

When using an active mode configuration (Passive = False) with a firewall, it may be necessary to specify the actual PORT value to be sent to the server. ActiveModePORTAddress takes the protocol-level parameter in the form "a,b,c,d,e,f" where "a,b,c,d" is the external IP address separated by commas, and e and f represent, respectively, the high-byte (divide by 256) and the low-byte (mod 256) values of the external port where the FTP client is listening.

This configuration setting must be used in conjunction with PortRange to ensure that the correct port is used by the client.

AppendToLocalFile:   Append downloaded files to a local file.

If set to True, the downloaded files will be appended to the file specified in LocalFile.

ApplyFileMaskLocally:   Whether to filter the directory listing locally or on the server.

If set to true any filemask provided to RemoteFile will be applied locally, after the server has returned the results. When set to false (default), the value in RemoteFile will be sent to the server as part of the relevant listing command. Because using filemasks with list commands is not standardized, some servers do not support them and will return an error.

AutoSelectDataIP:   Automatically select the data connection IP.

This setting controls the selection logic of the data connection. By default, this value is True and the component will attempt to determine the best IP for the data connection based on the returned value from the server. It is recommended to leave this value set to True unless there is a reason to disable it.

In many cases, FTP servers are not configured to return a valid public IP in the PASV response. When Secure Sockets Layer/Transport Layer Security (SSL/TLS) is used any network address translation (NAT) done by the firewall cannot occur. The result is the client may receive an IP that is not accessible.

This setting is designed to allow the connection to succeed in as many cases as possible. When the IP for the data connection is received from the server, the component will inspect the value. If the received value is not within the known private IP ranges, the component will use it, assuming it is a valid public IP. If the received value is a private IP, the component will instead assume the data connection should be established to the same IP as the command connection (true in almost all cases).

When this setting is False, the component will not perform any checks on the received value. When set to False, UseRemoteHostAddressForPassive is applicable.

CalculatePercentDone:   Enables or Disables calculating the percent complete for downloads.

When set to true (default), the component sends an FTP SIZE command to retrieve the file size before beginning a download. When downloading a large quantity of small files, performance may be increased by disabling this feature.

CheckTotalEntry:   Whether to ignore directory listing total lines.

Some servers will include "total" information when returning a directory listing that contains non-entry data. When CheckTotalEntry is set to True (default), the component will ignore lines beginning with "total" to account for this. In some cases, it may be desirable to include these lines in the resulting DirList data; this can be done by setting this configuration setting to False.

DILinger:   When set to True, DI connections are terminated gracefully.

This property controls how the DI connection is closed. The default is True.

In the case that DILinger is True (default), follow two scenarios to determine how long the connection will linger. In the first scenario, if DILingerTime is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires.

In the second scenario, DILingerTime is a positive value, the system will attempt to send pending data until the specified DILingerTime is reached. If this attempt fails, then the system will reset the connection.

The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the component returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes).

Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (by a client acknowledgment, for example), setting this property to False might be the appropriate course of action.

DILingerTime:   Time in seconds to have the DI connection linger.

LingerTime is the time, in seconds, to let the socket connection linger. This value is 0 by default, which means it will use the default IP timeout.

DirEntryPattern:   Allows the use of regular expressions to parse non-standard directory entry formats.

In some cases, the server may return a directory entry format that cannot be automatically parsed by the adapter. In this case, the full entry format can be seen in the DirEntry parameter of DirList. You can use this property to define a regular expression to parse the entry. The value of this setting is specified in the following format:

A,B,C,X=Y|RegEx

A,B,C, and X represent integer values that correspond to the capturing groups of the regular expression in the following order:

  • FileName
  • FileSize
  • FileTime
  • IsDir

Because group X represents the IsDir value, the user must specify Y to indicate what value that group must have in order for IsDir to be True.

Take, for instance, a simple entry in this format:

22 Test.txt

In this example, "22" is the FileSize and "Test.txt" is the FileName. To parse this entry, we will define the DirEntryPattern as follows:

2,1,-1,-1|([0-9]+)\s(.*)

The first value "2" indicates that the first field (FileName) corresponds to the second capturing group in the regular expression. The second value "1" indicates that the second field (FileSize) corresponds to the first capturing group in the regular expression. The capturing group is the regular expression in parenthesis. In the previous example, the first capturing group is ([0-9]+) and the second capturing group is (.*).

As seen in this example, -1 also can be specified as the integer value. When this is specified, that field is ignored.

FileTimeFormat:   The format of file time reported by the server.

The default value is "M/d/yyyy hh:mm:ss tt". When set, the component will format the time returned by the server when calling the QueryFileTime method. To disable all formatting, set this to empty string.

Note: This setting applies only when calling QueryFileTime. It does not apply to the FileTime parameter of the DirList event.

IgnoreEntries:   Directory entry data to ignore.

Sometimes the FTP server will return data in a directory listing that is not entry data and can be ignored. The IgnoreEntries configuration setting takes a comma-separated list of entries to ignore. Only the beginning of the entries need to be specified and correct case is not required.

MaskSensitive:   Masks passwords in logs.

The default value is False. When set to True, the component will mask passwords that otherwise would appear in its logs.

MaxDirEntries:   Instructs component to save the amount of entries specified that are returned by the server after a ListDirectory call has been made.

This configuration setting should be set when populating the DirList collection after a call to either ListDirectory or ListDirectoryLong. This value represents the number of entries that are to be saved in the collection.

To save all items to the collection, set this configuration setting to -1. If no items are wanted, set this to 0, which will not save any items to the collection. The default for this configuration setting is -1, so all items will be included in the collection.

ModeZCompressionLevel:   Used to specify the level of compression used.

The default value is 7. Valid values range from 0 to 9. A higher value indicates that a higher compression level is being used. This is valid only when UseModeZ is set to True.

PortRange:   Allows the specification of a port range where the component listens for active mode connections.

When set to use active mode (Passive = False), the component uses any available port to listen to incoming connections from the server. You can override this behavior by setting PortRange to a value containing the range of ports the component will be listening to.

The range is provided as start-end, for instance: "1024-" stands for anything higher than 1024, "1024-2048" stands for ports between 1024 and 2048 inclusive, "4000-4010, 50000-50010" stands for ports between 4000 and 4010 or between 50000 and 50010.

PreserveFileTime:   Attempts to preserve timestamps when transferring files.

When set to True, the component will try to preserve timestamps when transferring files. The MDTM command is used when downloading, and the MFTM command is used when uploading. The server must support these commands for this to work and is False by default.

RealTimeUpload:   Enables real time uploading.

When this value is set to True, the component will upload the data in the file specified by LocalFile and continue monitoring LocalFile for additional data to upload until no new data is found for RealTimeUploadAgeLimit seconds. This allows you to start uploading a file immediately after the file is created and continue uploading as data is written to the file. The default value is False.

RealTimeUploadAgeLimit:   The age limit in seconds when using RealTimeUpload.

This value is only applicable when RealTimeUpload is set to "True". This specifies the number of seconds for which the component will monitor LocalFile for new data to upload. If this limit is reached and no new data are found in LocalFile the upload will complete. The default value is "1".

ReusePISSLSessionInDI:   Whether the PI SSL session will be reused for the DI connection.

When set to True (default), the component will reuse the PI SSL session when creating the DI connection. When set to False, the component will create a separate SSL session for the DI connection. The default value is True.

ReuseSSLSessionInDI:   Whether the SSL session will be reused for the DI connection.

When set to True (default), the component will ask the server to reuse the existing DI Secure Sockets Layer (SSL) session. When set to False, a new SSL session will always be created for the DI connection.

UseClearChannel:   Allows for the Clear Command Channel (CCC) command.

When this is set, the component will send the CCC command to the server requesting a clear (unprotected) command channel.

UseClearDataChannel:   Allows for the PROT C command.

When this is set, the component will use a clear (unprotected) data channel by sending the PROT C command to the server.

UseEPSV:   Allows extended passive mode.

When this is set, the extended passive mode will be used.

UseMLSD:   Uses listings for machine processing.

When this is set to True, the component will list files in the directory using the MLSD command. This command is an extension to the protocol that defines a more standardized and reliable directory listing format. Not all servers support this command. The default value is False.

When set to True, set RemoteFile to the filemask and call either ListDirectory or ListDirectoryLong. There is no difference between the two methods when this setting is enabled.

UseMLST:   Uses single file listing for machine processing.

This setting is similar to UseMLSD except that it is valid only for a single file. When this is set to True, the component will list the file or folder specified by RemoteFile. If RemoteFile is not set, a listing for the current directory will be returned. This command is an extension to the protocol, which defines a more standardized and reliable directory listing format, but does so only for a single file or folder. Not all servers support this command. The default value is False.

When set to True, set RemoteFile to the file or folder you wish to get information about and call either ListDirectory or ListDirectoryLong. There is no difference between the two methods when this setting is enabled. When both UseMLSD and UseMLST are set, UseMLSD takes precedence.

UseModeZ:   Allows compression to be used when transferring data.

The default value is False. When set to True, the component will issue the MODE Z command to the FTP server. This will enable deflate compression so that all data transferred are first compressed either by the server (when downloading) or by the component (when uploading). Note: Not all servers support this feature.

UseOldAUTHSSL:   Allows use of the 'AUTH SSL' command instead of 'AUTH TLS'.

By default, the component uses the standard AUTH TLS command to initiate the SSL handshake with the server. This configuration setting is included for optional support of older servers that support only the AUTH SSL command.

Note: Using AUTH SSL instead of AUTH TLS is strongly discouraged because of potential security vulnerabilities. If you must use this configuration setting, please do so very carefully.

UseProtWhenImplicit:   Sends the PROT P command to the server.

When SSLStartMode is set to sslImplicit, setting this to True will instruct the component to send the PROT P command to the server. This explicitly tells the server that the data channel will be protected. The default value is True.

UseRemoteHostAddressForPassive:   Instructs the component to use the address specified by RemoteHost when establishing a data connection.

When this setting is True, the component will use the address specified by RemoteHost when establishing a data connection for directory listings and file transfers. This setting is applicable only when AutoSelectDataIP is set to False.

When this setting is False (default) and AutoSelectDataIP is also False, the component will use the IP address returned by the server when establishing a data connection.

This setting is not applicable when Passive is set to False (Active mode).

VirtualHostName:   Sends the HOST command to the server.

Defined in RFC 7151, the HOST command allows user-FTP processes to specify which virtual host to connect to for a server-FTP process that is handling requests for multiple virtual hosts on a single IP address. When this configuration setting is set, the HOST command is sent to the server before authenticating.

TCPClient Config Settings

CloseStreamAfterTransfer:   If true, the component will close the upload or download stream after the transfer.

This setting determines whether the input or output stream is closed after the transfer completes. When set to True (default), all streams will be closed after a transfer is completed. In order to keep streams open after the transfer of data, set this to False. the default value is True.

ConnectionTimeout:   Sets a separate timeout value for establishing a connection.

When set, this configuration setting allows you to specify a different timeout value for establishing a connection. Otherwise, the component will use Timeout for establishing a connection and transmitting/receiving data.

FirewallAutoDetect:   Tells the component whether or not to automatically detect and use firewall system settings, if available.

This configuration setting is provided for use by components that do not directly expose Firewall properties.

FirewallHost:   Name or IP address of firewall (optional).

If a FirewallHost is given, requested connections will be authenticated through the specified firewall when connecting.

If the FirewallHost setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the FirewallHost setting is set to the corresponding address. If the search is not successful, an error is returned.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

FirewallListener:   If true, the component binds to a SOCKS firewall as a server (TCPClient only).

This entry is for TCPClient only and does not work for other components that descend from TCPClient.

If this entry is set, the component acts as a server. RemoteHost and RemotePort are used to tell the SOCKS firewall in which address and port to listen to. The firewall rules may ignore RemoteHost, and it is recommended that RemoteHost be set to empty string in this case.

RemotePort is the port in which the firewall will listen to. If set to 0, the firewall will select a random port. The binding (address and port) is provided through the ConnectionStatus event.

The connection to the firewall is made by calling the Connect method.

FirewallPassword:   Password to be used if authentication is to be used when connecting through the firewall.

If FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

FirewallPort:   The TCP port for the FirewallHost;.

The FirewallPort is set automatically when FirewallType is set to a valid value.

Note: This configuration setting is provided for use by components that do not directly expose Firewall properties.

FirewallType:   Determines the type of firewall to connect through.

The appropriate values are as follows:

0No firewall (default setting).
1Connect through a tunneling proxy. FirewallPort is set to 80.
2Connect through a SOCKS4 Proxy. FirewallPort is set to 1080.
3Connect through a SOCKS5 Proxy. FirewallPort is set to 1080.
10Connect through a SOCKS4A Proxy. FirewallPort is set to 1080.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

FirewallUser:   A user name if authentication is to be used connecting through a firewall.

If the FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the Firewall. If the authentication fails, the component throws an exception.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

KeepAliveInterval:   The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.

When set, TCPKeepAlive will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by KeepAliveTime. If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This configuration setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. This system default if this value is not specified here is 1 second.

Note: This value is not applicable in macOS.

KeepAliveTime:   The inactivity time in milliseconds before a TCP keep-alive packet is sent.

When set, TCPKeepAlive will automatically be set to True. By default, the operating system will determine the time a connection is idle before a Transmission Control Protocol (TCP) keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds.

Linger:   When set to True, connections are terminated gracefully.

This property controls how a connection is closed. The default is True.

In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if LingerTime is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires.

In the second scenario, if LingerTime is a positive value, the system will attempt to send pending data until the specified LingerTime is reached. If this attempt fails, then the system will reset the connection.

The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the component returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes).

Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action.

LingerTime:   Time in seconds to have the connection linger.

LingerTime is the time, in seconds, the socket connection will linger. This value is 0 by default, which means it will use the default IP timeout.

LocalHost:   The name of the local host through which connections are initiated or accepted.

The LocalHost setting contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface.

If the component is connected, the LocalHost setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

LocalPort:   The port in the local host where the component binds.

This must be set before a connection is attempted. It instructs the component to bind to a specific port (or communication endpoint) in the local machine.

Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established.

LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.

This; setting is useful when trying to connect to services that require a trusted port in the client side. An example is the remote shell (rsh) service in UNIX systems.

MaxLineLength:   The maximum amount of data to accumulate when no EOL is found.

MaxLineLength is the size of an internal buffer, which holds received data while waiting for an EOL string.

If an EOL string is found in the input stream before MaxLineLength bytes are received, the DataIn event is fired with the EOL parameter set to True, and the buffer is reset.

If no EOL is found, and MaxLineLength bytes are accumulated in the buffer, the DataIn event is fired with the EOL parameter set to False, and the buffer is reset.

The minimum value for MaxLineLength is 256 bytes. The default value is 2048 bytes.

MaxTransferRate:   The transfer rate limit in bytes per second.

This configuration setting can be used to throttle outbound TCP traffic. Set this to the number of bytes to be sent per second. By default, this is not set and there is no limit.

ProxyExceptionsList:   A semicolon separated list of hosts and IPs to bypass when using a proxy.

This configuration setting optionally specifies a semicolon-separated list of hostnames or IP addresses to bypass when a proxy is in use. When requests are made to hosts specified in this property, the proxy will not be used. For instance:

www.google.com;www.nsoftware.com

TCPKeepAlive:   Determines whether or not the keep alive socket option is enabled.

If set to True, the socket's keep-alive option is enabled and keep-alive packets will be sent periodically to maintain the connection. Set KeepAliveTime and KeepAliveInterval to configure the timing of the keep-alive packets.

Note: This value is not applicable in Java.

TcpNoDelay:   Whether or not to delay when sending packets.

When true, the socket will send all data that is ready to send at once. When false, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm.

By default, this config is set to false.

UseIPv6:   Whether to use IPv6.

When set to 0 (default), the component will use IPv4 exclusively. When set to 1, the component will use IPv6 exclusively. To instruct the component to prefer IPv6 addresses, but use IPv4 if IPv6 is not supported on the system, this setting should be set to 2. The default value is 0. Possible values are:

0 IPv4 Only
1 IPv6 Only
2 IPv6 with IPv4 fallback

UseNTLMv2:   Whether to use NTLM V2.

When authenticating with NTLM, this setting specifies whether NTLM V2 is used. By default this value is False and NTLM V1 will be used. Set this to True to use NTLM V2.

SSL Config Settings

CACertFilePaths:   The paths to CA certificate files when using Mono on Unix/Linux.

This setting specifies the paths on disk to CA certificate files when using Mono on Unix/Linux. It is not applicable in any other circumstances.

The value is formatted as a list of paths separated by semicolons. The component will check for the existence of each file in the order specified. When a file is found the CA certificates within the file will be loaded and used to determine the validity of server or client certificates.

The default value is:

/etc/ssl/ca-bundle.pem;/etc/pki/tls/certs/ca-bundle.crt;/etc/ssl/certs/ca-certificates.crt;/etc/pki/tls/cacert.pem

LogSSLPackets:   Controls whether SSL packets are logged when using the internal security API.

When SSLProvider is set to Internal, this setting controls whether SSL packets should be logged. By default, this setting is False, as it is only useful for debugging purposes.

When enabled, SSL packet logs are output using the SSLStatus event, which will fire each time an SSL packet is sent or received.

Enabling this setting has no effect if SSLProvider is set to Platform.

ReuseSSLSession:   Determines if the SSL session is reused.

If set to true, the component will reuse the context if and only if the following criteria are met:

  • The target host name is the same.
  • The system cache entry has not expired (default timeout is 10 hours).
  • The application process that calls the function is the same.
  • The logon session is the same.
  • The instance of the component is the same.

SSLCACerts:   A newline separated list of CA certificate to use during SSL client authentication.

This setting specifies one or more CA certificates to be included in the request when performing SSL client authentication. Some servers require the entire chain, including CA certificates, to be presented when performing SSL client authentication. The value of this setting is a newline (CrLf) separated list of certificates. For instance:

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

SSLCheckCRL:   Whether to check the Certificate Revocation List for the server certificate.

This setting specifies whether the component will check the Certificate Revocation List specified by the server certificate. If set to 1 or 2, the component will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The component will then make HTTP requests to each CRL endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the component throws an exception.

When set to 0 (default) the CRL check will not be performed by the component. When set to 1, it will attempt to perform the CRL check, but will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.

This configuration setting is only supported in the Java, C#, and C++ editions. In the C++ edition, it is only supported on Windows operating systems.

SSLCipherStrength:   The minimum cipher strength used for bulk encryption.

This minimum cipher strength largely dependent on the security modules installed on the system. If the cipher strength specified is not supported, an error will be returned when connections are initiated.

Please note that this setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the SSLStatus event.

Use this setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.

When the provider is OpenSSL, SSLCipherStrength is currently not supported. This functionality is instead made available through the OpenSSLCipherList config setting.

SSLEnabledCipherSuites:   The cipher suite to be used in an SSL negotiation.

The enabled cipher suites to be used in SSL negotiation.

By default, the enabled cipher suites will include all available ciphers ("*").

The special value "*" means that the component will pick all of the supported cipher suites. If SSLEnabledCipherSuites is set to any other value, only the specified cipher suites will be considered.

Multiple cipher suites are separated by semicolons.

Example values when SSLProvider is set to Platform: obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=CALG_AES_256"); obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES"); Possible values when SSLProvider is set to Platform include:

  • CALG_3DES
  • CALG_3DES_112
  • CALG_AES
  • CALG_AES_128
  • CALG_AES_192
  • CALG_AES_256
  • CALG_AGREEDKEY_ANY
  • CALG_CYLINK_MEK
  • CALG_DES
  • CALG_DESX
  • CALG_DH_EPHEM
  • CALG_DH_SF
  • CALG_DSS_SIGN
  • CALG_ECDH
  • CALG_ECDH_EPHEM
  • CALG_ECDSA
  • CALG_ECMQV
  • CALG_HASH_REPLACE_OWF
  • CALG_HUGHES_MD5
  • CALG_HMAC
  • CALG_KEA_KEYX
  • CALG_MAC
  • CALG_MD2
  • CALG_MD4
  • CALG_MD5
  • CALG_NO_SIGN
  • CALG_OID_INFO_CNG_ONLY
  • CALG_OID_INFO_PARAMETERS
  • CALG_PCT1_MASTER
  • CALG_RC2
  • CALG_RC4
  • CALG_RC5
  • CALG_RSA_KEYX
  • CALG_RSA_SIGN
  • CALG_SCHANNEL_ENC_KEY
  • CALG_SCHANNEL_MAC_KEY
  • CALG_SCHANNEL_MASTER_HASH
  • CALG_SEAL
  • CALG_SHA
  • CALG_SHA1
  • CALG_SHA_256
  • CALG_SHA_384
  • CALG_SHA_512
  • CALG_SKIPJACK
  • CALG_SSL2_MASTER
  • CALG_SSL3_MASTER
  • CALG_SSL3_SHAMD5
  • CALG_TEK
  • CALG_TLS1_MASTER
  • CALG_TLS1PRF
Example values when SSLProvider is set to Internal: obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_DH_ANON_WITH_AES_128_CBC_SHA"); Possible values when SSLProvider is set to Internal include:
  • TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_RSA_WITH_AES_256_GCM_SHA384
  • TLS_RSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
  • TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
  • TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
  • TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  • TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
  • TLS_DH_RSA_WITH_AES_128_GCM_SHA256 (Not Recommended)
  • TLS_DH_RSA_WITH_AES_256_GCM_SHA384 (Not Recommended)
  • TLS_DH_DSS_WITH_AES_128_GCM_SHA256 (Not Recommended)
  • TLS_DH_DSS_WITH_AES_256_GCM_SHA384 (Not Recommended)
  • TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
  • TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
  • TLS_RSA_WITH_AES_256_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  • TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
  • TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  • TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
  • TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
  • TLS_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
  • TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
  • TLS_DHE_DSS_WITH_AES_256_CBC_SHA
  • TLS_RSA_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  • TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
  • TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
  • TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  • TLS_DHE_DSS_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
  • TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
  • TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
  • TLS_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_RSA_WITH_DES_CBC_SHA
  • TLS_DHE_RSA_WITH_DES_CBC_SHA
  • TLS_DHE_DSS_WITH_DES_CBC_SHA
  • TLS_RSA_WITH_RC4_128_MD5
  • TLS_RSA_WITH_RC4_128_SHA

When TLS 1.3 is negotiated (see SSLEnabledProtocols) only the following cipher suites are supported:

  • TLS_AES_256_GCM_SHA384
  • TLS_CHACHA20_POLY1305_SHA256
  • TLS_AES_128_GCM_SHA256

SSLEnabledCipherSuites is used together with SSLCipherStrength.

SSLEnabledProtocols:   Used to enable/disable the supported security protocols.

Used to enable/disable the supported security protocols.

Not all supported protocols are enabled by default (the value of this setting is 4032). If you want more granular control over the enabled protocols, you can set this property to the binary 'OR' of one or more of the following values:

TLS1.312288 (Hex 3000)
TLS1.23072 (Hex C00) (Default)
TLS1.1768 (Hex 300) (Default)
TLS1 192 (Hex C0) (Default)
SSL3 48 (Hex 30)
SSL2 12 (Hex 0C)

SSLEnabledProtocols - TLS 1.3 Notes

By default when TLS 1.3 is enabled the component will use the internal TLS implementation.

In editions which are designed to run on Windows SSLProvider can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is only supported on Windows 11 / Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version.

If set to 1 (Platform provider) please be aware of the following notes:

  • The platform provider is only available on Windows 11 / Windows Server 2022 and up.
  • SSLEnabledCipherSuites and other similar SSL configuration settings are not supported.
  • If SSLEnabledProtocols includes both TLS 1.3 and TLS 1.2 the above restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions.

SSLEnableRenegotiation:   Whether the renegotiation_info SSL extension is supported.

This setting specifies whether the renegotiation_info SSL extension will be used in the request when using the internal security API. This setting is true by default, but can be set to false to disable the extension.

This setting is only applicable when SSLProvider is set to Internal.

SSLIncludeCertChain:   Whether the entire certificate chain is included in the SSLServerAuthentication event.

This setting specifies whether the Encoded parameter of the SSLServerAuthentication event contains the full certificate chain. By default this value is False and only the leaf certificate will be present in the Encoded parameter of the SSLServerAuthentication event.

If set to True all certificates returned by the server will be present in the Encoded parameter of the SSLServerAuthentication event. This includes the leaf certificate, any intermediate certificate, and the root certificate.

Note: When SSLProvider is set to Internal this value is automatically set to true. This is needed for proper validation when using the internal provider.

SSLKeyLogFile:   The location of a file where per-session secrets are written for debugging purposes.

This setting optionally specifies the full path to a file on disk where per-session secrets are stored for debugging purposes.

When set, the component will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffice for debugging purposes. When writing to this file the component will only append, it will not overwrite previous values.

Note: This setting is only applicable when SSLProvider is set to Internal.

SSLNegotiatedCipher:   Returns the negotiated ciphersuite.

Returns the ciphersuite negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipher[connId]");

SSLNegotiatedCipherStrength:   Returns the negotiated ciphersuite strength.

Returns the strength of the ciphersuite negotiated during the SSL handshake.

Note: For server components (e.g.TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipherStrength[connId]");

SSLNegotiatedCipherSuite:   Returns the negotiated ciphersuite.

Returns the ciphersuite negotiated during the SSL handshake represented as a single string.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipherSuite[connId]");

SSLNegotiatedKeyExchange:   Returns the negotiated key exchange algorithm.

Returns the key exchange algorithm negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedKeyExchange[connId]");

SSLNegotiatedKeyExchangeStrength:   Returns the negotiated key exchange algorithm strength.

Returns the strenghth of the key exchange algorithm negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedKeyExchangeStrength[connId]");

SSLNegotiatedVersion:   Returns the negotiated protocol version.

Returns the protocol version negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedVersion[connId]");

SSLSecurityFlags:   Flags that control certificate verification.

The following flags are defined (specified in hexadecimal notation). They can be or-ed together to exclude multiple conditions:

0x00000001Ignore time validity status of certificate.
0x00000002Ignore time validity status of CTL.
0x00000004Ignore non-nested certificate times.
0x00000010Allow unknown Certificate Authority.
0x00000020Ignore wrong certificate usage.
0x00000100Ignore unknown certificate revocation status.
0x00000200Ignore unknown CTL signer revocation status.
0x00000400Ignore unknown Certificate Authority revocation status.
0x00000800Ignore unknown Root revocation status.
0x00008000Allow test Root certificate.
0x00004000Trust test Root certificate.
0x80000000Ignore non-matching CN (certificate CN not-matching server name).

This functionality is currently not available in Java or when the provider is OpenSSL.

SSLServerCACerts:   A newline separated list of CA certificate to use during SSL server certificate validation.

This setting optionally specifies one or more CA certificates to be used when verifying the server certificate. When verifying the server's certificate the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This setting should only be set if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store.

The value of this setting is a newline (CrLf) separated list of certificates. For instance:

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

TLS12SignatureAlgorithms:   Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.

This setting specifies the allowed server certificate signature algorithms when SSLProvider is set to Internal and SSLEnabledProtocols is set to allow TLS 1.2.

When specified the component will verify that the server certificate signature algorithm is among the values specified in this setting. If the server certificate signature algorithm is unsupported the component throws an exception.

The format of this value is a comma separated list of hash-signature combinations. For instance: TCPClient.SSLProvider = TCPClientSSLProviders.sslpInternal; TCPClient.Config("SSLEnabledProtocols=3072"); //TLS 1.2 TCPClient.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa"); The default value for this setting is sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa.

In order to not restrict the server's certificate signature algorithm, specify an empty string as the value for this setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.

TLS12SupportedGroups:   The supported groups for ECC.

This setting specifies a comma separated list of named groups used in TLS 1.2 for ECC.

The default value is ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1.

When using TLS 1.2 and SSLProvider is set to Internal, the values refer to the supported groups for ECC. The following values are supported:

  • "ecdhe_secp256r1" (default)
  • "ecdhe_secp384r1" (default)
  • "ecdhe_secp521r1" (default)

TLS13KeyShareGroups:   The groups for which to pregenerate key shares.

This setting specifies a comma separated list of named groups used in TLS 1.3 for key exchange. The groups specified here will have key share data pregenerated locally before establishing a connection. This can prevent an additional round trip during the handshake if the group is supported by the server.

The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result only some groups are included by default in this setting.

Note: All supported groups can always be used during the handshake even if not listed here, but if a group is used which is not present in this list it will incur an additional round trip and time to generate the key share for that group.

In most cases this setting does not need to be modified. This should only be modified if there is a specific reason to do so.

The default value is ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072

The values are ordered from most preferred to least preferred. The following values are supported:

  • "ecdhe_x25519" (default)
  • "ecdhe_x448"
  • "ecdhe_secp256r1" (default)
  • "ecdhe_secp384r1" (default)
  • "ecdhe_secp521r1"
  • "ffdhe_2048" (default)
  • "ffdhe_3072" (default)
  • "ffdhe_4096"
  • "ffdhe_6144"
  • "ffdhe_8192"

TLS13SignatureAlgorithms:   The allowed certificate signature algorithms.

This setting holds a comma separated list of allowed signature algorithms. Possible values are:

  • "ed25519" (default)
  • "ed448" (default)
  • "ecdsa_secp256r1_sha256" (default)
  • "ecdsa_secp384r1_sha384" (default)
  • "ecdsa_secp521r1_sha512" (default)
  • "rsa_pkcs1_sha256" (default)
  • "rsa_pkcs1_sha384" (default)
  • "rsa_pkcs1_sha512" (default)
  • "rsa_pss_sha256" (default)
  • "rsa_pss_sha384" (default)
  • "rsa_pss_sha512" (default)
The default value is rsa_pss_sha256,rsa_pss_sha384,rsa_pss_sha512,rsa_pkcs1_sha256,rsa_pkcs1_sha384,rsa_pkcs1_sha512,ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384,ecdsa_secp521r1_sha512,ed25519,ed448. This setting is only applicable when SSLEnabledProtocols includes TLS 1.3.
TLS13SupportedGroups:   The supported groups for (EC)DHE key exchange.

This setting specifies a comma separated list of named groups used in TLS 1.3 for key exchange. This setting should only be modified if there is a specific reason to do so.

The default value is ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192

The values are ordered from most preferred to least preferred. The following values are supported:

  • "ecdhe_x25519" (default)
  • "ecdhe_x448" (default)
  • "ecdhe_secp256r1" (default)
  • "ecdhe_secp384r1" (default)
  • "ecdhe_secp521r1" (default)
  • "ffdhe_2048" (default)
  • "ffdhe_3072" (default)
  • "ffdhe_4096" (default)
  • "ffdhe_6144" (default)
  • "ffdhe_8192" (default)

Socket Config Settings

AbsoluteTimeout:   Determines whether timeouts are inactivity timeouts or absolute timeouts.

If AbsoluteTimeout is set to True, any method which does not complete within Timeout seconds will be aborted. By default, AbsoluteTimeout is False, and the timeout is an inactivity timeout.

Note: This option is not valid for UDP ports.

FirewallData:   Used to send extra data to the firewall.

When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g. headers for custom authentication schemes).

InBufferSize:   The size in bytes of the incoming queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. Increasing the value of the InBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

OutBufferSize:   The size in bytes of the outgoing queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. Increasing the value of the OutBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

Base Config Settings

BuildInfo:   Information about the product's build.

When queried, this setting will return a string containing information about the product's build.

GUIAvailable:   Tells the component whether or not a message loop is available for processing events.

In a GUI-based application, long-running blocking operations may cause the application to stop responding to input until the operation returns. The component will attempt to discover whether or not the application has a message loop and, if one is discovered, it will process events in that message loop during any such blocking operation.

In some non-GUI applications, an invalid message loop may be discovered that will result in errant behavior. In these cases, setting GUIAvailable to false will ensure that the component does not attempt to process external events.

LicenseInfo:   Information about the current license.

When queried, this setting will return a string containing information about the license this instance of a component is using. It will return the following information:

  • Product: The product the license is for.
  • Product Key: The key the license was generated from.
  • License Source: Where the license was found (e.g., RuntimeLicense, License File).
  • License Type: The type of license installed (e.g., Royalty Free, Single Server).
  • Last Valid Build: The last valid build number for which the license will work.
UseInternalSecurityAPI:   Tells the component whether or not to use the system security libraries or an internal implementation.

By default the component will use the system security libraries to perform cryptographic functions where applicable. When set to false calls to unmanaged code will be made. In certain environments this is not desirable. To use a completely managed security implementation set this setting to true. Setting this to true tells the component to use the internal implementation instead of using the system's security API.

Note: This setting is static. The value set is applicable to all components used in the application.

When this value is set the product's system DLL is no longer required as a reference, as all unmanaged code is stored in that file.

Trappable Errors (FTP Component)

FTP Errors

118   Firewall error. The error description contains detailed information.
141   FTP error. The error message contains the server reply.
142   Communication error. The error message contains the description.
143   Busy executing current method.
144   Local file error. The error description contains detailed information.
145   Can't open LocalFile for reading.
146   No RemoteFile specified while uploading.
147   Data interface error. The error description contains detailed information.
148   LocalFile already exists and overwrite is False.
149   Windows message queue dropped a message (typically due to heavy load).
301   Operation is interrupted.
302   Can't open local file.
311   Accept failed for data connection.
312   Asynchronous select failed for data connection.

The component may also return one of the following error codes, which are inherited from other components.

TCPClient Errors

100   You cannot change the RemotePort at this time. A connection is in progress.
101   You cannot change the RemoteHost (Server) at this time. A connection is in progress.
102   The RemoteHost address is invalid (0.0.0.0).
104   Already connected. If you want to reconnect, close the current connection first.
106   You cannot change the LocalPort at this time. A connection is in progress.
107   You cannot change the LocalHost at this time. A connection is in progress.
112   You cannot change MaxLineLength at this time. A connection is in progress.
116   RemotePort cannot be zero. Please specify a valid service port number.
117   You cannot change the UseConnection option while the component is active.
135   Operation would block.
201   Timeout.
211   Action impossible in control's present state.
212   Action impossible while not connected.
213   Action impossible while listening.
301   Timeout.
303   Could not open file.
434   Unable to convert string to selected CodePage.
1105   Already connecting. If you want to reconnect, close the current connection first.
1117   You need to connect first.
1119   You cannot change the LocalHost at this time. A connection is in progress.
1120   Connection dropped by remote host.

SSL Errors

270   Cannot load specified security library.
271   Cannot open certificate store.
272   Cannot find specified certificate.
273   Cannot acquire security credentials.
274   Cannot find certificate chain.
275   Cannot verify certificate chain.
276   Error during handshake.
280   Error verifying certificate.
281   Could not find client certificate.
282   Could not find server certificate.
283   Error encrypting data.
284   Error decrypting data.

TCP/IP Errors

10004   [10004] Interrupted system call.
10009   [10009] Bad file number.
10013   [10013] Access denied.
10014   [10014] Bad address.
10022   [10022] Invalid argument.
10024   [10024] Too many open files.
10035   [10035] Operation would block.
10036   [10036] Operation now in progress.
10037   [10037] Operation already in progress.
10038   [10038] Socket operation on non-socket.
10039   [10039] Destination address required.
10040   [10040] Message too long.
10041   [10041] Protocol wrong type for socket.
10042   [10042] Bad protocol option.
10043   [10043] Protocol not supported.
10044   [10044] Socket type not supported.
10045   [10045] Operation not supported on socket.
10046   [10046] Protocol family not supported.
10047   [10047] Address family not supported by protocol family.
10048   [10048] Address already in use.
10049   [10049] Can't assign requested address.
10050   [10050] Network is down.
10051   [10051] Network is unreachable.
10052   [10052] Net dropped connection or reset.
10053   [10053] Software caused connection abort.
10054   [10054] Connection reset by peer.
10055   [10055] No buffer space available.
10056   [10056] Socket is already connected.
10057   [10057] Socket is not connected.
10058   [10058] Can't send after socket shutdown.
10059   [10059] Too many references, can't splice.
10060   [10060] Connection timed out.
10061   [10061] Connection refused.
10062   [10062] Too many levels of symbolic links.
10063   [10063] File name too long.
10064   [10064] Host is down.
10065   [10065] No route to host.
10066   [10066] Directory not empty
10067   [10067] Too many processes.
10068   [10068] Too many users.
10069   [10069] Disc Quota Exceeded.
10070   [10070] Stale NFS file handle.
10071   [10071] Too many levels of remote in path.
10091   [10091] Network subsystem is unavailable.
10092   [10092] WINSOCK DLL Version out of range.
10093   [10093] Winsock not loaded yet.
11001   [11001] Host not found.
11002   [11002] Non-authoritative 'Host not found' (try again or check DNS setup).
11003   [11003] Non-recoverable errors: FORMERR, REFUSED, NOTIMP.
11004   [11004] Valid name, no data record (check DNS setup).

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IPWorks 2022 .NET Edition - Version 22.0 [Build 8369]