Re: how to test the performance of modified openssh

This is a discussion on Re: how to test the performance of modified openssh within the OpenSSH Development forums, part of the Networking and Network Related category; > Chris: make sure you have clientloop.c rev 1.171. There's a latent bug > that sets the ...


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Old 01-14-2008
Chris Rapier
 
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Default Re: how to test the performance of modified openssh


> Chris: make sure you have clientloop.c rev 1.171. There's a latent bug
> that sets the max packet size to nonsensically large values for remote
> port forwards, which may or may not be affecting you.


Thanks for the hint. I'll check what my revs are and recompile.
> I've also done the "time ssh server true" thing Ben suggested when
> looking at things that potentially change the connection establishment
> time (not that common, but things like Diffie-Hellman tweaks, random
> reseeding or the recent protocol 1 ephemeral server key thing).


I'm just curious but do any of the authentication procedures, aside from
interactive ones, have more challenge response or data exchanges than
any of the others? In quite a few situations RTT is going to have an
overwhelming effect on perceived performance.

> The catch is that if your authentication require user interaction then
> you have a massive extra variable which you would need to account for.


Users suck.

;)


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