If AcceptAnySignerCert is set to true, the component will accept any signer certificate for the incoming signature. Use of this setting in production is discouraged, as failing to authenticate the sender poses a security risk.

Use this configuration setting to map alternate charset names to a valid charset name. The mappings are set with this format: "AlternateCharsetNames=altName1:validName1;altName2:validname2".

The alternate names are case-insensitive to allow for a greater number of alternate names to be handled. The valid name is case-sensitive to ensure the correct charset is used. Mappings are done on a one-to-one basis. If there are several alternate names that are not covered by case-insensitivity, multiple mappings will need to be used. as2reciever.Config("AlternateCharsetNames=cp-850:cp850;_cp_850:cp850"); The example above will map both "cp-850" and "_cp_850" to "cp850".

The below example is redundant, as alternate names are case-insensitive. as2reciever.Config("AlternateCharsetNames=cp1252:windows-1252;CP1252:windows-1252");

The version of AS2 that was used in the incoming message.

The version of AS2 to be used in the outgoing message.

If the Authorization setting contains a non-empty string, an Authorization HTTP request header is added to the request. This header conveys Authorization information to the server.

This setting is provided so that the component can be extended with other security schemes in addition to the authorization schemes already implemented by the component.

The AuthScheme; setting defines the authentication scheme used. In the case of HTTP Basic Authentication (default), every time User and Password are set, they are Base64 encoded, and the result is put in the Authorization setting in the form "Basic [encoded-user-password]".

Use the AuthScheme property to tell the component which type of authorization to perform when the User and Password properties are set. Possible values are:

For security reasons, setting this value will clear the values of User and Password.

This is True by default. In ASP.NET the HttpRequest.InputStream property will internally buffer the entire HTTP request before returning it. When BufferRequest is set to False the component will use an alternative approach that allows for true streaming. When BufferRequest is set to False, the component cannot be run in a default medium trust environment and requires a custom security policy file to be used.

Note: If you plan to support AS2 restart functionality through the use of RestartDirectory and ProcessRestartRequest this must be set to False to ensure proper functionality.

This setting specifies a relative or absolute path on disk where certificates received from a CEM request will be saved. The filename format is: CEMRequestId + "_" + CertId + ".cer" The CEMRequestId may be retrieved from the CEMRequest event. Any invalid characters will be replaced with "_". If there is an error writing the file to disk the Error event will fire with details. To overwrite existing certificate files set OverwriteCEMCerts to True.

If this is not set, the certificates will be held in memory and can be accessed via CEMDetails. See CEMRequest for details.

Determines if the stream specified by OutputStream is closed after ParseRequest or ProcessRequest returns. By default this is True. Setting this to False keeps the stream open for further use.

This configuration is only necessary when decoding EDI messages that contain attachments. If a value is specified for DecodeTempDirectory, the component will first decode the S/MIME message to the temp directory, then decode the embedded MIME message containing attachments to the IncomingDirectory.

Note: When using this configuration, if IncomingDirectory is not set, the component will not clean up any temp files it creates. These files must be monitored and cleaned manually by the user.

When receiving messages this setting controls whether the component attempts to detect duplicate messages. Consider the following scenario:

A sender transmits a message, it is successfully received but the MDN cannot be delivered due to a network error. The sender does not receive the MDN and retransmits the message.

This results in two messages being received and processed. In most cases this is not an issue as the backend processing done outside of the component will detect duplicate messages. However, this setting may be enabled to have the component check for duplicates to prevent duplicate incoming messages.

When enabled, LogDirectory must be set to a value that will resolve to the same location for both received requests. This means the "%Date:Format%" macro must not be used in the LogDirectory value. Additionally, this functionality can only work if the sender uses the same MessageId in both requests.

If a duplicate is detected, no exception is thrown, but the component will respond with an MDN including a warning that a duplicate was detected. The message in the duplicate request will not be processed.

The default value is False.

This setting optionally specifies a directory on disk where details about previously received messages is stored. If this is not set LogDirectory is used. This setting is only applicable when DetectDuplicates is True.

If the data is encrypted, EncryptionAlgorithm will contain the encryption algorithm used to encrypt the data; i.e., "3DES". If the data is not encrypted EncryptionAlgorithm will contain an empty string.

If the data is encrypted this setting contains the padding scheme used when the data was originally encrypted. Possible values are:

• RSAES-PKCS1-v1_5
• RSAES-OAEP

If the data is encrypted, EncryptionType will contain the MIME type of the encrypted data; i.e., "application/pkcs7-mime". If the data is not encrypted EncryptionType will contain an empty string.

At present only "application/pkcs7-mime" is supported for decryption.

By default, ParseRequest will halt and throw an exception if Request contains errors or requests algorithms, protocols, or receipt types not supported by the component. By setting ErrorProcessingFlags the component can be configured to not halt for certain types of errors. The errors will still be reported in ScanResult.

Use of this property allows EDIData to be determined even if the component is not fully able to respond to the client's request.

ErrorReportingFlags control how the errors are reported in the MDNReceipt.

The value should be set to the OR of one or more of the following values:

0x04 Unable to validate integrity of data, or unsupported signing protocol used.

0x08 Unable to authenticate the sender.

0x10 Client requested unsupported signature type.

0x20 Client requested unsupported MIC algorithm.

By default, MDNReceipt will report an error if any of the conditions below occur. The MIC will not be calculated and the data will be reported as unprocessed.

The MDNReceipt may be configured to permit one or more of the errors below. A warning will be reported if MDNWarning is set; otherwise the error will silently be ignored. Note that errors should be ignored only with extreme caution, and only by agreement of both trading parties.

Multiple errors may be permitted by OR-ing the flags together.

The value should be set to the OR of one or more of the following values:

0x04 Unable to validate integrity of data, or unsupported signing protocol used.

0x08 Unable to authenticate the sender.

0x10 Client requested unsupported signature type.

0x20 Client requested unsupported MIC algorithm.

This setting specifies whether to read the filename from the MIME part header (default) or the HTTP header.

When processing a request that supports filename preservation the filename will be read from the MIME body part by default. The MIME body part should hold the filename in the Content-Disposition header for that part as per the specification.

Some implementations do not behave according to the specification and specify the filename in the HTTP Content-Disposition header instead of the MIME part headers.

Possible value are:

When this setting is enabled (default False), any errors that occur while writing to log files will be ignored, and no exception will be thrown. Note that this may cause logs to be incomplete or missing without any indication that an issue occurred.

Used to implement support for Filename Preservation with Associated MDN Response as requested by the Financial Services Technical Consortium (fstc.org). The following options are supported:

If set to 1 (Warn), the component will rename the filename as above to avoid file conflicts, but will issue a MDN warning when the filename provided is missing, contains invalid characters, or is detected as a duplicate (this behavior is governed by the Duplicate parameter of the EDIDataInfo event).

If set to 2 (Fail), the component will reject transmissions where the filename provided is missing, contains invalid characters, or is detected as a duplicate.

This setting specifies whether to log debug data. When set to True the component will create additional files in the LogDirectory. The default value is False.

When sending, files with extensions ".input", ".sign", ".compress", and ".encrypt" may be created. When receiving, files with extensions ".input", ".verify", ".decompress", and ".decrypt" may be created.

If set, this will be used as for the filename of the log file.

Note that only the base name should be specified as the component will append the appropriate file extension.

When LogDirectory is set, several pieces of information are written to log files in the specified directory. Set LogOptions to one or more of the following values to control what information is written to file. When specifying multiple values, include them in the same string (i.e. "LogOptions=Status, Response, Payload"):

Messages may contain multiple MIME parts if attachments are present. This setting specifies the maximum number of MIME parts to process. The default value is "100", which means 99 attachments will be processed. Each message contains one MIME part for the body, and one additional MIME part for each attachment. Set this value to "-1" to indicate no restrictions.

If specified, this setting overrides the MDN disposition that was automatically calculated by the component. In most cases this is not necessary but may be used when specifying a custom Disposition header is required. For instance: as2receiver.Config("MDNDisposition=message-deemed-invalid-due-to-unknown-from-and.or-to-parties");

By default, the component will honor the request of the client, if possible. The MIC will be calculated using the requested algorithm, stored in the MICValue property of MDNReceipt, and reported in the outgoing MDN. If not possible, the MDN will not be signed, and ParseRequest will throw an exception unless ErrorProcessingFlags has been configured to prevent this. The following options are supported:

The property may be set to one of the listed values above to override the client's request, and use the specified signing algorithm. Use extreme caution when doing this; it will result in a non-RFC compliant server.

The name of the user agent performing the disposition. The RFC 2298 recommendation is to use the DNS name of the user agent and the name of the software performing the disposition, for example, "edi-server.nsoftware.com; /n software EDI Server Demo".

MDNSendingMode allows the server software to describe the level of user interaction in sending the MDN. MDNSendingMode corresponds to the "disposition-mode" field in the Disposition Header, as described further in RFC 3335. The following values are supported:

By default, the disposition-mode value will be "automatic-action/MDN-sent-automatically".

MDNWarning defines a warning to appear in the outgoing MDNReceipt. If any errors are returned in ScanResult and not marked as to be allowed in ErrorReportingFlags the errors will take precedence and the warning will not be reported.

MDNWarning should be assigned when allowing the errors returned in ScanResult. The MDNReceipt will indicate successful processing of Request, but will contain a Warning field. The following warnings are defined by the AS2 specifications:

"authentication-failed, processing continued"

Any other warnings are not defined by the specifications and may or may not be understood by the client.

This setting determines whether to normalize line endings before signature verification.

In most cases the signature is verified by calculating a Message Integrity Check (MIC) over the exact data that is received. In some cases other software such as Mendelson AS2 may calculate signatures over a version of the data with normalized line endings. During processing attempts to verify a signature that was created in this manner may lead to one of the following errors:

• Unable to verify content integrity: Message digest mismatch in signature.
• The receipt signature could not be verified: Message digest mismatch in signature.

If one of the errors above is encountered and the received data is expected to be otherwise correct setting this setting to True may resolve the issue by normalizing line endings before verifying the signature.

Note: This should only be set to True if there is a specific reason to do so.

This setting specifies whether CEM certificates are overwritten in CEMCertDir when another certificate with the same name and Id is received. The default value is False.

If AuthScheme is set to Basic, the User and Password are Base64 encoded and the result is put in the Authorization configuration setting in the form "Basic [encoded-user-password]".

If AuthScheme is set to Digest, the User and Password properties are used to respond to the HTTP Digest Authentication challenge from the server.

The User and Password properties must be set only after the URL property is set. When the URL property is set, for security reasons, User and Password are immediately cleared.

When set to true the component will treat the incoming request like it is in chunked-encoding and attempt to de-chunk it before processing.

In most situations this is not required as the incoming HTTP server will process the chunked encoding before the data is returned to the component. This setting is only useful in cases where the HTTP server will not process the chunked encoding, or when processing a request outside of the context of an HTTP server and the request passed to the component is chunked encoded.

The default value is "false".

If ProcessingError is set to "True" before invoking CreateMDNReceipt, a MDN with the disposition "processed/Error: unexpected-processing-error" is returned.

This setting is used while sending an asynchronous MDN.

This setting is used while sending an asynchronous MDN.

This setting is used while sending an asynchronous MDN.

This setting is used while sending an asynchronous MDN.

This setting is used while sending an asynchronous MDN.

The protocol used to sign the outgoing MDNReceipt. The following values are supported:

If the client does not request a signature, one will not be provided by default. However, the server may provide one by setting ReceiptSigningProtocol to PKCS7 (1). If the client requests a signature, and the signature protocol is supported by the component, the request must be honored, per RFC specifications.

This property will contain the algorithm(s) requested ("sha1", "md5", "sha-256", etc.) as well as the importance ("required" or "optional") specified by the client. If multiple algorithms are specified, precedence is given to the ones on the left. Formatting is as in RFC 3335, e.g., "optional, sha1, md5".

This setting will contain an empty string if a MIC was not requested.

This property will contain the protocol requested ("pkcs7-signature" or "pgp-signature") as well as the importance ("required" or "optional") specified by the client, as formatted in RFC 3335, e.g., "optional, pkcs7-signature".

This setting will contain an empty string if a signature was not requested.

This config allows for the AS2 message to be read from a file at the specified location on disk. The file can contain either just the body of the AS2 request, or it can contain both the headers and the body.

If the file includes the headers, they should be separated from the body by a double CRLF pair. If the file doesn't include the headers, they will need to be set to the RequestHeadersString property.

This setting is used while processing the received message and causes an exception to be thrown if the message is not intended for the receiver specified by RequireAS2To.

This setting specifies a comma separated list of allowed signature algorithms used in messages verified by the component. By default the setting is empty and any signature algorithm is supported. To restrict the algorithms to one or more values set this setting to a comma separated list. For instance sha1,sha256.

This setting is used while processing the received message and causes an exception to be thrown if the encryption requirement is not met.

This setting is used while processing the received message and enforces a requirement that the EncryptionPaddingScheme be RSAES-OAEP. If the message was encrypted with any other padding scheme the component throws an exception

This setting is used while processing the received message and enforces a requirement that the SenderSignatureScheme be RSASSA-PSS. If the message was signed with any other scheme the component throws an exception

This setting is used while processing the received message and causes an exception to be thrown if the signature requirement is not met.

The human-readable subject to be used for the MDN response.

This will contain the name of the algorithm used to sign the incoming message. Possible values are:

• sha1
• md5
• sha-256
• sha-384
• sha-512
• sha-224

This setting returns the signature scheme used when the incoming message was originally signed. Possible values are:

• RSASSA-PKCS1-v1_5
• RSASSA-PSS

This property will contain the protocol requested ("pkcs7-signature" or "pgp-signature") as well as the importance ("required" or "optional") specified by the client, as formatted in RFC 3335, e.g., "optional, pkcs7-signature".

This setting will contain an empty string if a signature was not requested.

This setting specifies one or more CA certificates to be used when verifying signed messages.

To support multiple CA signing certificates, add all the certificates in the chain by prepending a '+' character to the PEM formatted certificate data. For example, the code below adds two certs to the RootCertificate property. as2receiver.RootCertificate = cert1; as2receiver.RootCertificate = "+" + cert2;

In case an asynchronous MDN is requested over SMTP, the sender; i.e., the value of "From".

In case an asynchronous MDN is delivered over SMTP, the address of the server to be used to send it.

If AuthScheme is set to Basic, the User and Password are Base64 encoded and the result is put in the Authorization configuration setting in the form "Basic [encoded-user-password]".

If AuthScheme is set to Digest, the User and Password properties are used to respond to the HTTP Digest Authentication challenge from the server.

The User and Password properties must be set only after the URL property is set. When the URL property is set, for security reasons, User and Password are immediately cleared.

This setting controls whether to log a .wrn file or a .err file in the LogDirectory when MDN delivery fails. When set to True and MDN delivery fails a .wrn file is created in the LogDirectory. This allows an application to treat MDN failures as warnings when monitoring log files. When set to False and MDN delivery fails a .err file is created. The default value is False.

Note: This setting is not applicable when calling SendAsyncMDN.

When AllowHTTPCompression is True, the component adds an Accept-Encoding header to the request being sent to the server. By default, this header's value is "gzip, deflate". This configuration setting allows you to change the value of the Accept-Encoding header. Note: The component only supports gzip and deflate decompression algorithms.

This configuration setting enables HTTP compression for receiving data. When set to True (default), the component will accept compressed data. It then will uncompress the data it has received. The component will handle data compressed by both gzip and deflate compression algorithms.

When True, the component adds an Accept-Encoding header to the outgoing request. The value for this header can be controlled by the AcceptEncoding configuration setting. The default value for this header is "gzip, deflate".

The default value is True.

This configuration setting controls whether HTTP/2 connections are permitted to fall back to HTTP/1.1 when the server does not support HTTP/2. This setting is applicable only when HTTPVersion is set to "2.0".

If set to True (default), the component will automatically use HTTP/1.1 if the server does not support HTTP/2. If set to False, the component throws an exception if the server does not support HTTP/2.

The default value is True.

This configuration setting applies only when AuthScheme is set to Negotiate. If set to True, the component will automatically use New Technology LAN Manager (NTLM) if the server does not support Negotiate authentication. Note: The server must indicate that it supports NTLM authentication through the WWW-Authenticate header for the fallback from Negotiate to NTLM to take place. The default value is False.

This configuration setting determines whether data will be appended when writing to LocalFile. When set to True, downloaded data will be appended to LocalFile. This may be used in conjunction with Range to resume a failed download. This is applicable only when LocalFile is set. The default value is False.

If the Authorization property contains a nonempty string, an Authorization HTTP request header is added to the request. This header conveys Authorization information to the server.

This property is provided so that the HTTP component can be extended with other security schemes in addition to the authorization schemes already implemented by the component.

The AuthScheme property defines the authentication scheme used. In the case of HTTP Basic Authentication (default), every time User and Password are set, they are Base64 encoded, and the result is put in the Authorization property in the form "Basic [encoded-user-password]".

This configuration setting returns the raw number of bytes from the HTTP response data, before the component processes the data, whether it is chunked or compressed. This returns the same value as the Transfer event, by BytesTransferred.

This is applicable only when UseChunkedEncoding is True. This setting specifies the chunk size in bytes to be used when posting data. The default value is 16384.

If set to True, the body of a PUT or POST request will be compressed into gzip format before sending the request. The "Content-Encoding" header is also added to the outgoing request.

The default value is False.

If set to True, the URL passed to the component will be URL encoded. The default value is False.

This option determines what happens when the server issues a redirect. Normally, the component returns an error if the server responds with an "Object Moved" message. If this property is set to 1 (always), the new URL for the object is retrieved automatically every time.

If this property is set to 2 (Same Scheme), the new URL is retrieved automatically only if the URL Scheme is the same; otherwise, the component throws an exception.

Note: Following the HTTP specification, unless this option is set to 1 (Always), automatic redirects will be performed only for GET or HEAD requests. Other methods potentially could change the conditions of the initial request and create security vulnerabilities.

Furthermore, if either the new URL server or port are different from the existing one, User and Password are also reset to empty, unless this property is set to 1 (Always), in which case the same credentials are used to connect to the new server.

A Redirect event is fired for every URL the product is redirected to. In the case of automatic redirections, the Redirect event is a good place to set properties related to the new connection (e.g., new authentication parameters).

The default value is 0 (Never). In this case, redirects are never followed, and the component throws an exception instead.

Following are the valid options:

• 0 - Never
• 1 - Always
• 2 - Same Scheme

The default value is False. If set to True, the component will perform a GET on the new location. Otherwise, it will use the same HTTP method again.

HTTP/2 servers maintain a dynamic table of headers and values seen over the course of a connection. Typically, these headers are inserted into the table through incremental indexing (also known as HPACK, defined in RFC 7541). To tell the component not to use incremental indexing for certain headers, and thus not update the dynamic table, set this configuration option to a comma-delimited list of the header names.

This property specifies the HTTP version used by the component. Possible values are as follows:

• "1.0"
• "1.1" (default)
• "2.0"
• "3.0"

When using HTTP/2 ("2.0"), additional restrictions apply. Please see the following notes for details.

HTTP/2 Notes

When using HTTP/2, a secure Secure Sockets Layer/Transport Layer Security (TLS/SSL) connection is required. Attempting to use a plaintext URL with HTTP/2 will result in an error.

If the server does not support HTTP/2, the component will automatically use HTTP/1.1 instead. This is done to provide compatibility without the need for any additional settings. To see which version was used, check NegotiatedHTTPVersion after calling a method. The AllowHTTPFallback setting controls whether this behavior is allowed (default) or disallowed.

HTTP/2 is supported on all versions of Windows. If the Windows version is an earlier version than Windows 8.1/Windows Server 2012 R2, the internal security implementation will be used. If the Windows version is Window 8.1/Windows Server 2012 R2 or later, the system security libraries will be used by default.

HTTP/3 Notes

HTTP/3 is supported only in .NET and Java.

When using HTTP/3, a secure (TLS/SSL) connection is required. Attempting to use a plaintext URL with HTTP/3 will result in an error.

If this setting contains a nonempty string, an If-Modified-Since HTTP header is added to the request. The value of this header is used to make the HTTP request conditional: if the requested documented has not been modified since the time specified in the field, a copy of the document will not be returned from the server; instead, a 304 (not modified) response will be returned by the server and the component throws an exception

The format of the date value for IfModifiedSince is detailed in the HTTP specs. For example: Sat, 29 Oct 2017 19:43:31 GMT.

If true, the component will not send the Connection: Close header. The absence of the Connection header indicates to the server that HTTP persistent connections should be used if supported. Note: Not all servers support persistent connections. If false, the connection will be closed immediately after the server response is received.

The default value for KeepAlive is false.

If the Service Principal Name on the Kerberos Domain Controller is not the same as the URL that you are authenticating to, the Service Principal Name should be set here.

This configuration setting controls the level of detail that is logged through the Log event. Possible values are as follows:

The value 1 (Info) logs basic information, including the URL, HTTP version, and status details.

The value 2 (Verbose) logs additional information about the request and response.

The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any).

This configuration setting should be set when the TransferredHeaders collection is to be populated when a Header event has been fired. This value represents the number of headers 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.

This configuration setting should be set when populating the Cookies collection as a result of an HTTP request. This value represents the number of cookies 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.

When FollowRedirects is set to any value other than frNever, the component will follow redirects until this maximum number of redirect attempts are made. The default value is 20.

This configuration setting may be queried after the request is complete to indicate the HTTP version used. When HTTPVersion is set to "2.0" (if the server does not support "2.0"), then the component will fall back to using "1.1" automatically. This setting will indicate which version was used.

This configuration setting can be set to a string of headers to be appended to the HTTP request headers.

The headers must follow the format "header: value" as described in the HTTP specifications. Header lines should be separated by CRLF ("\r\n") .

Use this configuration setting with caution. If this configuration setting contains invalid headers, HTTP requests may fail.

This configuration setting is useful for extending the functionality of the component beyond what is provided.

This is similar to the Authorization configuration setting, but is used for proxy authorization. If this configuration setting contains a nonempty string, a Proxy-Authorization HTTP request header is added to the request. This header conveys proxy Authorization information to the server. If User and Password are specified, this value is calculated using the algorithm specified by AuthScheme.

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

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

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

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

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

This configuration setting returns the complete set of raw headers as sent by the client.

This configuration setting contains the result code of the last response from the server.

This setting contains the first line of the last response from the server. The format of the line will be [HTTP version] [Result Code] [Description].

This configuration setting contains the contents of the last response from the server.

If TransferredDataLimit is set to 0 (default), no limits are imposed. Otherwise, this reflects the maximum number of incoming bytes that can be stored by the component.

This configuration setting returns the complete set of raw headers as received from the server.

This configuration setting returns the full request as sent by the client. For performance reasons, the request is not normally saved. Set this configuration setting to ON before making a request to enable it. Following are examples of this request:

.NET Http http = new Http(); http.Config("TransferredRequest=on"); http.PostData = "body"; http.Post("http://someserver.com"); Console.WriteLine(http.Config("TransferredRequest")); C++ HTTP http; http.Config("TransferredRequest=on"); http.SetPostData("body", 5); http.Post("http://someserver.com"); printf("%s\r\n", http.Config("TransferredRequest"));

If UseChunkedEncoding is set to True, the component will use HTTP-chunked encoding when posting, if possible. HTTP-chunked encoding allows large files to be sent in chunks instead of all at once. If set to False, the component will not use HTTP-chunked encoding. The default value is False.

Note: Some servers (such as the ASP.NET Development Server) may not support chunked encoding.

This configuration setting specifies whether hostnames containing non-ASCII characters are encoded to internationalized domain names. When set to True, if a hostname contains non-ASCII characters, it is encoded using Punycode to an IDN (internationalized domain name).

The default value is False and the hostname will always be used exactly as specified.

This configuration setting specifies whether the platform's deflate-algorithm implementation is used to decompress responses that use compression. If set to True (default), the platform implementation is used. If set to False, an internal implementation is used.

When using this configuration setting, if True, the component will use the default HTTP client for the platform (URLConnection in Java, WebRequest in .NET, or CFHTTPMessage in Mac/iOS) instead of the internal HTTP implementation. This is important for environments in which direct access to sockets is limited or not allowed (e.g., in the Google AppEngine).

This configuration specifies whether the component will attempt to use the Proxy auto-config URL when establishing a connection and AutoDetect is set to True.

When True (default), the component will check for the existence of a Proxy auto-config URL, and if found, will determine the appropriate proxy to use.

This is the value supplied in the HTTP User-Agent header. The default setting is "IPWorks HTTP Component - www.nsoftware.com".

Override the default with the name and version of your software.

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.

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.

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

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.

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.

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.

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.

The appropriate values are as follows:

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

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.

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.

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.

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 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.

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).

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 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.

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.

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

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.

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.

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:

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.

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

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.

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.

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-----

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.

This setting specifies whether the component will use OCSP to check the validity of the server certificate. If set to 1 or 2, the component will first obtain the OCSP URL from the server certificate's OCSP extension. The component will then locate the issuing certificate and make an HTTP request to the OCSP 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 component will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP 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.

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.

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

• 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.

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:

SSLEnabledProtocols - TLS 1.3 Notes

By default when TLS 1.3 is enabled the component will use the internal TLS implementation when the SSLProvider is set to Automatic for all editions.

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.

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.

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.

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.

Returns the cipher suite 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]");

Returns the strength of the cipher suite 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]");

Returns the cipher suite 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]");

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]");

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]");

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]");

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

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

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-----

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: component.SSLProvider = TCPClientSSLProviders.sslpInternal; component.Config("SSLEnabledProtocols=3072"); //TLS 1.2 component.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.

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)

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"

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)

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)

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.

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).

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.

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.

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

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.

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.

In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to true to mask sensitive data. The default is true.

This setting only works on these components: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.

When set to true, the component will utilize the underlying operating system's certified APIs. Java editions, regardless of OS, utilize Bouncy Castle FIPS, while all the other Windows editions make use of Microsoft security libraries.

FIPS mode can be enabled by setting the UseFIPSCompliantAPI configuration setting to true. This is a static setting which applies to all instances of all components of the toolkit within the process. It is recommended to enable or disable this setting once before the component has been used to establish a connection. Enabling FIPS while an instance of the component is active and connected may result in unexpected behavior.

For more details please see the FIPS 140-2 Compliance article.

Note: This setting is only applicable on Windows.

Note: Enabling FIPS-compliance requires a special license; please contact sales@nsoftware.com for details.

When set to false, the component will use the system security libraries by default to perform cryptographic functions where applicable. In this case, 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 setting to true tells the component to use the internal implementation instead of using the system security libraries.

On Windows, this setting is set to false by default. On Linux/macOS, this setting is set to true by default.

If using the .NET Standard Library, this setting will be true on all platforms. The .NET Standard library does not support using the system security libraries.

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.