SFTP Forwarding Agent Configuration
To open the SFTP forwarding agent configuration, click Build → New Configuration . Select Workflow from the Configurations dialog. When prompted to Select workflow type , select Batch. Click Add agent and select SFTP in the Forwarding tab in the Agent Selection dialog. Double-click the agent icon or right-click the icon and select Edit agent, to display the Agent Configuration dialog.
You can configure part of the parameters in the Filename Sequence tab, see 3.1.6 Workflow Template for more information.
Connection Tab
The SFTP forwarding agent configuration - Connection tab
See the description of the Connection tab in SFTP Collection Agent Configuration.
Target Tab
The SFTP forwarding agent configuration - Target tab
The Target tab contains configuration settings related to the remote host, target directories and target files.
Setting | Description |
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Input File Handling Settings | |
Input Type | The agent can act on two input types. Depending on which one the agent is configured to work with, the behavior will differ. The default input type is bytearray, that is the agent expects bytearrays. If nothing else is stated, the documentation refer to input of bytearray. If the input type is |
File Information Settings | |
Directory | Absolute pathname of the target directory on the remote host, where the forwarded files will be placed. The pathname may also be given relative to the home directory of the user's account. The files will be temporarily stored in the automatically created subdirectory |
Create Directory | Select this check box to create the directory, or the directory structure, of the path that you specify in Directory. Note! The directories are created when the workflow is executed. |
Compression | Compression type of the destination files. Determines whether the agent will compress the output files as it writes them.
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Target File Handling Settings | |
Produce Empty Files | If you require to create empty files, check this setting. |
Select the behavior of the agent when the file already exists, the alternatives are:
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Temporary File Handling Settings | |
If this option is selected, the agent will move the file to a temporary directory before moving it to the target directory. After the whole file has been transferred to the target directory, and the | |
If there is no write access to the target directory and, hence, a temporary directory cannot be created, the agent can move the file to a temporary file that is stored directly in the target directory. After the whole file has been transferred, and the The temporary filename is unique for every execution of the workflow. It consists of a workflow and agent ID, and a file number. | |
Select how to handle the file in case of cancelBatch or rollback, either Delete Temporary File or Leave Temporary File. Note! When a workflow aborts, the file will not be removed until the next time the workflow is started. |
Advanced Tab
The SFTP forwarding agent configuration - Advanced tab
The Advanced tabs contain configurations related to more specific use of the SFTP service, which might not be frequently utilized.
Setting | Description |
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Advanced Settings | |
Port | The port number the SFTP service will use on the remote host. |
Timeout (s) | The maximum time, in seconds, to wait for response from the server. 0 (zero) means to wait forever. |
Accept New Host Keys | If selected, the agent overwrites the existing host key when the host is represented with a new key. The default behavior is to abort when the key mismatches. Note! Selecting this option causes a security risk since the agent will accept new keys regardless if they might belong to another machine. |
Enable Key Re-Exchange | Used to enable and disable automatic re-exchange of session keys during ongoing connections. This can be useful if you have long lived sessions since you may experience connection problems for some SFTP servers if one of the sides initiates a key re-exchange during the session. |
Buffered Mode | Select this check box to enable buffered mode on the SFTP client. |
Additional Hosts Settings | |
Additional Hosts | List of additional host names or IP-addresses that may be used to establish a connection. These hosts are tried, in sequence from top to bottom, if the agents fail to connect to the remote host set in their Connection tabs. Use the , , , and buttons to configure the host list. |
After Treatment Settings | |
Execute | During transfer a temporary file is written, which is then moved to the final file. Select if the script should be executed on the transferred working copy or the final file with the following two options:
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Command | Enter a command or a script. The script will be executed on the remote system from it's working directory. |
Argument | This field is optional. Each entered parameter value has to be separated from the preceding value with a space. The temporary filename is inserted as the second last parameter, and the final filename is inserted as the last parameter, automatically. This means that if, for instance, no parameter is given in the field, the arguments will be as follows: If three parameters are given in the Arguments field, the arguments are set as:
If After Move has been selected, the argument with <temporary filename> is excluded. |
Backlog Tab
The Backlog tab contains configurations related to backlog functionality. If the backlog is not enabled, the files will be moved directly to their final destination when an endBatch message is received. If the backlog however is enabled, the files will first be moved to a directory called DR_POSTPONED_MOVE_DIR and then to their final destination. For further information about the transaction behavior, see Retrieves in SFTP Forwarding Agent Transaction Behavior.
When backlog is initialized, and when backlogged files are transferred, a note is registered in the System Log.
The SFTP forwarding agent configuration - Backlog tab
Setting | Description |
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Enable Backlog | Enables backlog functionality. |
Directory | Base directory in which the agent will create sub directories to handle backlogged files. Absolute or relative path names can be used. |
Max Size Settings | |
Type | If you select the Files option, the Size field below will determine the maximum number of files allowed in the backlog folder. If you select the Bytes option, the Sizefield below will determine the total sum (size) of the files that resides in the backlog folder. If a limit is exceeded the workflow will abort. |
Size | Enter the maximum number of files or bytes that the backlog folder can contain. |
Processing Order Settings | |
Processing Order | Determines the order by which the backlogged data will be processed once connection is reestablished. Select between First In First Out (FIFO) or Last In First Out (LIFO). |
Duplicate File Handling Settings | |
Duplicate File Handling | Specifies the behavior if a file with the same file name as the one being transferred is detected. The options are Abort or Overwrite and the action is taken both when a file is transferred to the target directory or to the backlog. |
Security Tab
The SFTP forwarding agent configuration - Security tab
See the description of the Security tab in SFTP Collection Agent Configuration.
Note!
Due to an upgrade of the Maverick library for version 8.1.5.0, the default handling of the advanced security has changed. Users should take note of the behaviour change for the Advanced Security Option for the SFTP agents. The Advanced Security Option will be disabled by default. Users will have to enable it on their own accord from the Security Tab in the SFTP agents configuration.
With Advanced Security Option disabled, Maverick will manage the connection between the SFTP agent and the server. Maverick will attempt to connect with the STRONG security level. Failing to do so, it will auto downgrade the security level to WEAK and attempt to connect, this behaviour will allow our agents to work well with backwards compatibility for servers with older instances of the Maverick library. Furthermore, having STRONG security level will result in a performance degradation.
However, when a user manually enables the Advanced Security Option from the security tab, Maverick will instead assign the WEAK security level, which will not be as strict or resource intensive as the STRONG security level.
For more information about security levels, you can refer to this page: https://www.jadaptive.com/managed-security-in-our-java-ssh-apis/