Comment 21 for bug 556132

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Martin Pool (mbp) wrote : Re: [Bug 556132] Re: bzr: ERROR: paramiko.SSHException: Key-exchange timed out; consistent after sending 1GB data

On 17 January 2011 16:28, Michael Hudson-Doyle
<email address hidden> wrote:
>> I think I got a false pass because OpenSSH defaults to never initiating
>> rekeying from the client.
>
> Er.  This is not true, according to my understanding of things.

Sorry, I meant to say "not rekeying within the first 1GB".

>> If I set 'RekeyLimit 50k' then it does hang, and presumably will
>> eventually time out.  On the other hand running the same command
>> against qastaging, which does have this fix, succeeds.
>
> Note that rekeying involves many round trips and so frequent rekeying
> over a high latency link (such as over wifi at the rally) will be very
> slow.  How did you determine it had hung?

It was stuck for over a minute, with no IO.

>> So this should be fixed on the next major/with-downtime rollout of
>> Launchpad, in a couple of weeks(?).
>
> Did you write this before or after the 11.01 rollout?

Before. It really is FixReleased now.

--
Martin