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Date: Sat, 08 Jul 2006 10:42:38 -0500
From: Eric <eric@mikestammer.com>
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Subject: Re: Linksys router and ssh time outs ...
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User Freebsd wrote:
>>
>> Putty has an option to send keep alives every few seconds as does 
>> SecureCRT.
>
> Those are, ummm, Windows clients, right? :)
>
> I'm using OpenSSH on a FreeBSD desktop ... does it have similar? :)
>

it should, but i havent played with it. i found this tho:

For ssh2, you can choose the time in sshd_config by setting the
ClientAlive* options.  For ssh1, you need to tweak the system timers
on either the server or client system; this is of course system-dependent.

ClientAlive* are ssh protocol keepalives: the server and the client
exchange encrypted messages to test and maintain the connection. This
is more useful than tcp keepalives in some applications.

Checkout "man 5 sshd_config" and look for "ClientAliveInterval" and  
"ClientAliveCountMax".

might be worth playing with.