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Date:      Wed, 19 Jun 2002 00:24:43 +0300
From:      Giorgos Keramidas <keramida@ceid.upatras.gr>
To:        "Philip J. Koenig" <pjklist@ekahuna.com>
Cc:        questions@FreeBSD.ORG, Dan Nelson <dnelson@allantgroup.com>
Subject:   Re: kicking users
Message-ID:  <20020618212443.GB10528@hades.hell.gr>
In-Reply-To: <20020618022326603.AAA594@empty1.ekahuna.com@pc02.ekahuna.com>
References:  <20020618013550.GA6214@dan.emsphone.com> <20020618022326603.AAA594@empty1.ekahuna.com@pc02.ekahuna.com>

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On 2002-06-17 19:23 -0700, Philip J. Koenig wrote:
> > Hmm.  According to the sshd manpage, it already enables
> > keepalives.  Ignore my sysctl idea, then.
>
> Interesting you should mention that though.  I have a problem where
> sessions get killed off, and I think it's because of the stateful
> firewall on one or both ends of the connection timing out the
> session when no packets traverse it for 5-10 mins. (this is actually
> the main reason I end up wanting to kill 'zombie' user sessions)

This looks similar to troubles I had with a stateful ipfw firewall
that killed my ssh sessions too often for me to ignore it.  Try
increasing the lifetime of dynamic ipfw rules.  I now have in my
/etc/sysctl.conf file the following:

	net.inet.ip.fw.dyn_ack_lifetime=7200

- Giorgos


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