Call for testing: OpenSSH 8.0

Damien Miller djm at
Wed Apr 3 10:00:31 AEDT 2019

On Wed, 3 Apr 2019, Adam Eijdenberg wrote:

> On Wed, Apr 3, 2019 at 9:43 AM Damien Miller <djm at> wrote:
> > Could you try turning off IPQoS setting (ssh -oIPQoS=none ...) and seeing
> > whether that makes any difference?
> Yes - setting -oIPQoS=none on the client allows for a successful
> connection to the server.
> Would you still like me to check on the other things or is that enough
> to go on with?

No - it looks like a middlebox in Amazon's network might be getting confused
when the DSCP value changes during the connection.

Thanks a lot for helping to chase this down.


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