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On Tue, 11 Feb 2003, John Klos wrote:

> It sounds like you're using ssh2. On a VAX 4000/60, ssh2 takes around
> 30-35 seconds; I doubt, though, that this machine is 20 times faster.
> It's about the same speed with ssh logins as a 40 MHz 68040. One
> possibility (Ragge? Anyone?) is that the KA650 emulates certain
> instructions that ssh uses heavily? This was the case with the 68060 - it
> ran slower than a 68040 due to heavy use of emulated 64 bit multiply
> instructions until Ignatios made some 060 optimised code. The speedup was
> a factor of 4 to 6 times faster.
>
> Hmmm... 12 VUPs / 2.8 VUPs * 4 = about 17...
>
> Maybe you should try ssh -1 and see if it's closer to usable? Barring
> that, all I might recommend is using ssh to get into the network from afar
> (assuming you're on a private network), and using telnet within the local
> network...

Another thing worth noting is that the configuration file distributed
with NetBSD/vax 1.6 (/etc/ssh/sshd_config) is setup quite a bit differently
than the one that was released with NetBSD/vax 1.5.x (/etc/sshd.conf).
I've attached the files for comparison.  It's possible that the
differences between the 1.6 and the 1.5.x sshd configuration could
account for the performance differences (depending on the SSH protocol
version, the authentication mechanism, the key length chosen, the cipher
being used, etc.)

I've not run any of the 1.5 releases on VAX for any length of time, and
only from the console, so perhaps the shorter SSH login times I'm seeing
are a phenomenon of running 1.6.  Maybe someone else running a 1.5
release can comment on their experiences with it?  The only thing that
took a really long time for sshd on my 1.6 system was generating the
host specific RSA and DSA keys.  The DSA one took, possibly, in excess
of an hour or so.

-brian.

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