[Bridge] ssh connection not working when ssh server is behind a linux bridge

[Stephen Hemminger]

On Mon, 29 Jan 2018 10:42:19 +0100
Seweryn Niemiec <ser at man.szczecin.pl> wrote:

> On 28.01.2018 23:28, Stephen Hemminger wrote:
> > These symptoms sound like an MTU mismatch.
> > The padding is not related. More likely, the issue is that one side
> > is sending a larger frame than the MTU of the underlying interface.
> > Since the bridge is a pure layer 2 interface, it has not choice
> > but to drop any frame where the size is greater than the MTU.  
> 
> I have a similar problem (same infrastructure and same symptoms) but with random
> occurrence. Ssh session hangs randomly, usually before the login prompt is
> shown), sometimes a bit later, sometimes after few days. I have MTU 1500 on all
> interfaces taking part in communication. Ping of any size works and as far as I
> tested, HTTP communication too, but there are problems with HTTPS.
> 

If you see that, it usually is some middlebox in the way intefering with packets.