Subject: Re: ssh connections dropping...?
To: Peter Seebach <>
From: Manuel Bouyer <>
List: current-users
Date: 10/25/2004 20:19:38
On Mon, Oct 25, 2004 at 11:42:30AM -0500, Peter Seebach wrote:
> Okay, here's a mystery.
> I ssh home.  A lot.  If I leave an ssh connection idle for maybe 15 minutes,
> it generally hangs.  Sometimes, if I open a new ssh connection to it, the old
> one recovers.
> I thought "well, of course, this is just failures in the NAT gateways I'm
> behind".  (Say, in a hotel, or a coffee shop.)
> But.
> Last Tuesday, I was in a coffee shop with a friend.  A bit before I got there,
> he ssh'd into my home machine, where he has an account.  An hour and a half
> later, I noticed him logged in, and he said "oh, yeah, I'm still logged in",
> and sure enough, he's still logged in, and his shell connection is fine;
> meanwhile, mine are timing out.
> My home box is currently behind NAT, but I had the same problem before it
> was.  I don't know why this is the case.  This only seems to happen using
> a NetBSD box as a client.  My friend's box is a Mac.  This has happened
> over cell phone wireless (ppp0), 802.11b (wi0) and wired ethernet (fxp0).

Do you have keepalive turned on, and at which rate ?
This could be a difference in setup on the client side.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference