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Thu, 16 Jul 2009

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/Admin/SSH-SSL: SSH Constantly Connecting: ServerAliveInterval

I cannot believe I put up with this for so long: in the past when I connected to servers outside China, the SSH session would consistently disconnect after the terminal had been idle for only a very few minutes. This was very consistent, far more then "every once in a while". (I am guessing there was some Great FireWall-related foul play involved....)

Thanks to Donncha[1] I have an elegant one-line solution by adding the following to /etc/ssh/ssh_config:

ServerAliveInterval 60

This causes my ssh client to send a "keep alive" message to the server after 60 seconds of inactivity. Only if the server fails to respond is the connection broken. Even in China, this seems to be quite efficient at keeping my international ssh connections open for hours at a time.

[1] http://ocaoimh.ie/how-to-fix-ssh-timeout-problems/

posted at: 07:06 | path: /Admin/SSH-SSL | permanent link to this entry