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SFTP Configuration

The activity 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 activity, access to these internal properties is provided through the Other property.

SFTP Configuration Settings

IgnoreFileMaskCasing:   Instructs the activity to ignore casing of when FileMask is set.

By default the value of this setting is false. If set to true the activity will ignore case when matching a value to the FileMask.

FilePermissions:   Specifies the permissions of a file to be set after a successful upload.

This may be set to an octal value representing the permissions of a file to be set after a successful upload. For example:

FilePermissions=0777
Note: When using the SCP activity this must be a 4 digit value. The SFTP activity will accept a 3 digit value.
MaxFileData:   Specifies the maximum payload size of an SFTP packet.

While the SSH specification requires servers and clients to support SSH packets of at least 32000 bytes, some server implementations limit packet size to smaller values. MaxFileData provides a means by which the user can specify the maximum amount of data that can be put into an SFTP packet so that the activity can communicate effectively with these servers. If you are having difficulty when uploading to a server, try setting MaxFileData size to value smaller than 32000.

Most servers that use smaller values will use a maximum SSH packet size of 16KB (16384). In order to most efficiently communicate with such servers, MaxFileData size should be set to 14745.

ProtocolVersion:   The highest allowable SFTP version to use.

This governs the highest allowable SFTP version to use when negotiating the version with the server. The default value is 3 as this is the most common version. The component supports values from 3 to 6. It is recommended to use the default value of 3 unless there is a specific reason a higher version is needed.

ListDirBeforeDownload:   Determines if the directory is listed on download.

This is True by default. When set to False the activity will not list the directory before attempting a download. This may only be used when the exact name of the file is known and is specified in FileMask. This is helpful in situations where the name of the file is known and server permissions do not allow directory listings.

LocalEOL:   When TransferMode is set, this specifies the line ending for the local system.

This setting is only applicable when TransferMode is set to 1 (ASCII). The default value is a CrLf character sequence.

When uploading or downloading this value will be compared to ServerEOL. If ServerEOL and LocalEOL are different, the line endings in the file being transferred will be converted to the line endings used by the destination. Line endings will be converted to the value in LocalEOL when downloading. Line endings will be converted to the value in ServerEOL when uploading. If ServerEOL and LocalEOL are the same, no conversion takes place.

The value supplied to this setting should contain a C# .NET style character sequence:

TransferMode=1
LocalEOL=\r\ n

Conversion will only happen when TransferMode is set to 1 (ASCII) and ServerEOL and LocalEOL are different.

ServerEOL:   When TransferMode is set, this specifies the line ending for the remote system.

This setting is only applicable when TransferMode is set to 1 (ASCII). The default value is a CrLf character sequence.

When uploading or downloading this value will be compared to LocalEOL. If ServerEOL and LocalEOL are different, the line endings in the file being transferred will be converted to the line endings used by the destination. Line endings will be converted to the value in LocalEOL when downloading. Line endings will be converted to the value in ServerEOL when uploading. If ServerEOL and LocalEOL are the same, no conversion takes place.

The value supplied to this setting should contain a C# .NET style character sequence:

TransferMode=1
ServerEOL=\r\ n

Conversion will only happen when TransferMode is set to 1 (ASCII) and ServerEOL and LocalEOL are different.

TransferMode:   The transfer mode (ASCII or Binary).

The value 0 represents Binary and the value 1 represents ASCII. If the value is 0 (default), the initial server mode will be used.

When this value is set to 1 (ASCII) the activity will use the values specified in LocalEOL and ServerEOL to convert line endings as appropriate.

Note: When this value is set to 1 (ASCII) and ProtocolVersion is set to 4 or higher the activity will automatically determine the value for ServerEOL if the server supports the "newline" protocol extension.

RenameTo:   A filename to which RemoteFile will be renamed.

After downloading a file, the file on the server may be renamed using this setting. This rename action will take place after the batch submission to BizTalk. If you need to perform actions on a file before this, use the AfterGet property. This setting is used in conjunction with RenameMode to conditionally rename a file. For instance, to rename a file after it has been successfully submitted to BizTalk set the Other property of the activity like so:

RenameTo=%SourceFileName%.done
Macros such as %SourceFileName% are supported as in the given example. A full list of supported macros can be found at the bottom of this section.
RenameMode:   The condition under which RenameTo is used.

This setting controls when the value specified by RenameTo is used. If RenameTo is not specified, this setting has no impact. By default, downloaded files are only renamed after being successfully submitted to BizTalk (a value of 1). Possible values are:

1 (OnSuccess - default)The file is renamed using the value in RenameTo only after the message is successfully submitted to BizTalk.
2 (OnFailure)The file is renamed using the value in RenameTo only after the message submission to BizTalk fails.
3 (Always) The file is renamed using the value in RenameTo regardless of the message submission result.

TemporaryDownloadExtension:   An extension to be appended during download.

During download, it may be necessary for the file on the server to be renamed. After the download is complete the file will be renamed back to the original name.

TemporaryUploadExtension:   An extension to be appended during upload.

During upload, it may be necessary for the RemoteFile to be written to a temporary file name. For example, some business process may be set up to expect a specific file extension. Using this setting will allow the activity to upload the file without the remainder of the process attempting to pick up the incomplete file.

LogSSHPackets:   If True, detailed SSH packet logging is performed.

This setting can be enabled to assist in debugging. When set to True the activity will include detailed information about the SSH level packets in the log. The default value is False.

SSHAcceptServerHostKeyFingerPrint:   Instructs the activity to accept the server's host key with this fingerprint.

This may be set to a comma-delimited collection of 16-byte MD5 fingerprints that should be accepted as the host's key. You may supply it by HEX encoding the values in the form "0a:1b:2c:3d". Example:

SSHAcceptServerHostKeyFingerprint=0a:1b:2c:3d
SSHEncryptionAlgorithms:   A comma-separated list containing all allowable compression algorithms.

During the SSH handshake, this list will be used to negotiate the encryption algorithm to be used between the client and server. This list is used for both directions: client to server and server to client.

At least one supported algorithm must appear in this list. The following encryption algorithms are supported by the component:

aes256-cbc256-bit AES encryption in CBC mode
aes192-cbc192-bit AES encryption in CBC mode
aes128-cbc128-bit AES encryption in CBC mode
3des-cbc192-bit (3-key) triple DES encryption in CBC mode
aes256-ctr256-bit AES encryption in CTR mode
aes192-ctr192-bit AES encryption in CTR mode
aes128-ctr128-bit AES encryption in CTR mode
3des-ctr192-bit (3-key) triple DES encryption in CTR mode
cast128-cbcCAST-128 encryption
blowfish-cbcBlowfish encryption
arcfourARC4 encryption
arcfour128128-bit ARC4 encryption
arcfour256256-bit ARC4 encryption
aes256-gcm@openssh.com256-bit AES encryption in GCM mode.
aes128-gcm@openssh.com128-bit AES encryption in GCM mode.

The default value is "aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,arcfour256,arcfour128,arcfour,cast128-cbc,aes256-gcm@openssh.com,aes128-gcm@openssh.com".

SSHKeyExchangeAlgorithms:   Specifies the supported key exchange algorithms.

This may be used to specify the list of supported Key Exchange algorithms used during SSH negotiation. The value should contain a comma separated list of algorithms. Supported algorithms are:

  • diffie-hellman-group1-sha1
  • diffie-hellman-group14-sha1
  • diffie-hellman-group-exchange-sha256
  • diffie-hellman-group-exchange-sha1
The default value is: "diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1".
SSHMacAlgorithms:   Specifies the supported Mac algorithms.

This may be used to specify an alternate list of supported Mac algorithms used during SSH negotiation. This also specifies the order in which the Mac algorithms are preferred. The value should contain a comma separated list of algorithms. Supported algorithms are:

  • hmac-sha1
  • hmac-md5
  • hmac-sha1-96
  • hmac-md5-96
  • hmac-sha2-256
  • hmac-sha2-256-96
  • hmac-sha2-512
  • hmac-sha2-512-96
  • hmac-ripemd160
  • hmac-ripemd160-96
The default value is "hmac-sha1,hmac-md5,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-sha1-96,hmac-md5-96,hmac-sha2-256-96,hmac-sha2-512-96,hmac-ripemd160-96".

General Configuration 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.

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

The LocalHost configuration 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 multihomed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the activity initiate connections (or accept in the case of server activitys) only through that interface.

If the activity is connected, the LocalHost configuration 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 multihomed hosts (machines with more than one IP interface).

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.

UseManagedSecurityAPI:   Tells the activity whether or not to use the system security libraries or a managed implementation.

By default the activity will use the system security libraries to perform cryptographic functions. This means 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 activity to use the internal managed implementation instead of using the system's security API.

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

Connections Configuration Settings

PersistedConnectionTimeout:   How long to leave a persisted connection alive.

If persisted connections are enabled and PersistedConnectionTimeout is set to a positive value, the connection will be kept alive for that number of minutes after a message transmission. If no other messages are sent over that connection during the timeout period, the activity will disconnect from that server.

Note: the default value is 0. This value means that the connection will be kept alive unless the server disconnects it due to idling.

 
 
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