SSH disconnects very troubling

Jonathan Chen jonc at
Mon Dec 3 16:09:50 PST 2007

On Mon, Dec 03, 2007 at 06:22:40PM -0500, Anne Moore wrote:
> Hi All
> Whenever my users connect to my FreeBSD system, they are automatically
> disconnected after 1 minute of inactivity. This happens no matter if they
> are connected to our Oracle instance or SSH or Telnet, or anything. It's
> like the server "hangs-up" on them after no activity for a minute or so.
> I ran tcpdump during and received this error on the disconnect:
> 17:20:21.362159 IP > myhost1.rdm.loc.ssh: . ack 233 win
> 33303 <nop,nop,timestamp 2469825 98100123>
> I'm stumped! Does anyone have any idea why this might be happening?

Sounds like you've got a stateful firewall in the mix somewhere that's
disconnecting idle connections with a timeout of 1 minute.

Jonathan Chen <jonc at>
                "If everything's under control, you're going too slow"
                                                      - Mario Andretti

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