OpenSSH 6.4 connection to Cisco 6506 routers/switches fails

Darren Tucker dtucker at zip.com.au
Wed Nov 13 17:01:19 EST 2013


On Wed, Nov 13, 2013 at 12:44 AM, Loganaden Velvindron
<loganaden at gmail.com>wrote:
>
>  > Suggestions in approximate order of likelihood.
> >  - the additional KexAlgorithms exceed some static buffer in the Cisco.
> >  Try:
> > "KexAlgorithms
> diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1"
> >  - you have some kind of path MTU problem and the extra traffic from the
> > additional algorithms pushes you past some packet boundary.  Check the
> > "send-q" column on client and the equivalent on the server and see if
> > they're non-zero and non-decreasing).
>
> Shouldn't Mike open a ticket at CISCO so that they start fixing the
> software on their side as well ?


If my guesses are accurate, absolutely.  Right now they're just
unsubstantiated guesses, though,

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.


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