Bug#1087627: openssh-client: Session dies (quickly)

Hello Russ,
Am Sat, Nov 16, 2024 at 09:10:48AM -0800 schrieb Russ Allbery:
> Helge Kreutzmann <[email protected]> writes:
> 
> > About a week ago the connections started to terminate quickly, i.e.
> > after a few minutes (I can time this, if this is of any importance).  So
> > I return to the ssh client, and on the first key I hit, the session is
> > terminated and I get a message like:
> 
> > Connection to 142.132.201.35 closed.
> > client_loop: send disconnect: Broken pipe
> 
> Every time I personally have seen this specific symptom, it's because
> someone has changed the configuration of a network firewall or NAT
> translation box between me and the server and TCP sessions are now being
> dropped after a short idle timeout.
> 
> Try adding:
> 
>     ServerAliveInterval 50
> 
> to the relevant block in your client .ssh/config.  This will force the
> client to do network activity on the connection every 50s, which will
> hopefully be faster than the couple of minutes of inactivity timeout that
> I suspect you're seeing.  If this makes the problem go away, that makes it
> more likely that you're encountering some intermediate network hop with an
> aggressive idle connection timeout.
> 
> This is not necessarily a firewall.  I have seen this behavior even with
> home network wireless routers.  I blame it on network gear that has only
> ever been tested with HTTP traffic and has no idea what to do with
> long-lived persistent TCP connections that don't have constant traffic.

Thank you *very* much. I'll added this and try it out now.

(Yes, maybe in the server domain they "updated" some devices).

Greetings

           Helge

-- 
      Dr. Helge Kreutzmann                     [email protected]
           Dipl.-Phys.                   http://www.helgefjell.de/debian.php
        64bit GNU powered                     gpg signed mail preferred
           Help keep free software "libre": http://www.ffii.de/

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