Keeping SSH connections alive

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By default SSHd will terminate an ongoing connection if there was no traffic (incoming or outgoing) for a while.

If you usually leave remote sessions running for long amounts of time and hate the unexpected disconnects, this can be changed by enabling the keep-alive feature on the server directly so it applies to all remote sessions regardless of client used.

Prevent SSH from disconnecting idle sessions

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If you leave PuTTY connected for long periods of time on tail -f /some/log/file you may have noticed the SSH server disconnects you after a while if there is no new input on that log file.

You could configure PuTTY to enable connection keepalive functionality, but you’d need to either do that for every session or every saved server in the list. The easier way is to enable this functionality on the servers themselves…