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I am using autossh to build a reverse ssh tunnel but from time to time the tunnel stops working and I need to kill autossh and start it again.

/etc/cron.d/autossh
@reboot autossh -f -nNT -R 3269:intranet.example.com:3269 public.example.com &

autossh seems to remain in a strange state, where the forwarded port is still open but you get no response from the other side. By restarting autossh this is solved.

How can I prevent this problem from occurring?

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