Keep Alives

 

Dropped connections are annoying and time consuming. By enabling keep alives you can automatically keep the connection alive and configure how aggressively you want to try keeping FTP connection alive.

 

Routers and firewalls will often and in most cases by default close inactive connections, This allows them to work more efficiently however this can be troublesome for the FTP protocol.
 

     Enable Global keep Alives
When checked, allow global keep alive command to be sent in any session.

   Keep Alives Command
Below are the commands used by keep alive. Some FTP servers do not reset the activity timeout when noop is sent, we offer a couple additional commands to try to extend the connection for as long as possible.

NOOP
Sends the noop command. The default command and stands for no-operation.

PWD
Sends the PWD command.

LIST
Send the LIST command. The list command opens a data connection so this operation is more time consuming.

CWD
Send the CWD command.

Refresh
Refresh will send the LIST command and also update the file listing.

    Interval
This defines how long in seconds the keep alive command is sent, default is 120 seconds.

    seconds
Range is 1~72000

     Stop sending Keep Alives after
When checked, this limits the length of time keep alive commands are transmitted.

    minutes
Range is 1~72000

     Send NOOP command during transfer. (not recommended)
If your connection drops during a file transfer try checking this option, not all servers are compatible with this setting and it can cause additional problems.