You can set CuteFTP Pro to compensate for idle time during sessions by using Smart Keep Alive (SKA). SKA sends commands at random intervals to the FTP server, maintaining an active connection.
On the menu bar, go to Tools > Global Options.
Expand Connection.
Click Smart Keep Alive.
Enable Smart Keep Alive (SKA)
Select this check box to automatically send commands to a server to keep a connection open, and to make all the SKA options available.
Clear this check box to disable SKA and to disable all SKA options.
Start SKA n seconds after the last command
Choose how soon SKA will begin after transfers and other activity have stopped. You can choose to start SKA immediately or after 1,000 seconds (just under 17 minutes).
Maintain SKA for n minutes
Choose how long SKA will send commands to keep a connection open. You can choose as little as One minute, and as much as 1,000 minutes (just under 17 hours).
Send command at random intervals between n and n seconds
For after SKA has started, choose the shortest and longest time CuteFTP Pro will wait before sending a command to keep the connection open. You can choose to set times as low as zero seconds up to 1,000 seconds (just under 17 minutes). Between 30 and 60 seconds are the defaults.
Commands
Click the Add button to include new FTP commands in the list of possible commands sent to keep a connection open. CuteFTP Pro uses the listed commands.
Click the Remove button after highlighting a command in the list to exclude that command from the list of commands sent to keep a connection open.
If disconnected, auto-reconnect within n seconds
Select this check box to have CuteFTP Pro attempt a new connection with a server that has closed a connection. Choose a delay time between zero and 100 seconds.
Clear this check box if you don't want CuteFTP Pro to automatically attempt a new connection.
Obtain a new IP address when reconnecting (only for dialup connections)
Select this check box to have CuteFTP Pro disconnect and reconnect to the Internet before attempting to reconnect to a site. This option is not available with network or always-on connections.
Clear this check box to maintain the same dial-up connection after for attempts to re-connect to a site.