[CentOS] how to debug ssh slow connection issues.
Paul Heinlein
heinlein at madboa.com
Fri May 23 17:05:31 UTC 2008
On Fri, 23 May 2008, Jason Pyeron wrote:
> I do not have any ideas on this.
>
> Where should I start. [... lots and lots of snippage ...]
When sshd looks to be the culprit, my troubleshooting begins by
launching it in foreground mode on a non-standard port on the server:
sshd -ddd -p 2222
On the client, do
ssh -p 2222 your.server
If that doesn't provide good info, wrap sshd in strace:
strace -o /tmp/sshd-trace.txt sshd -d -p 2222
The strace output will show where the delays are occuring. (You can
modify timestamp info in the strace output. See the man page for
details.)
--
Paul Heinlein <> heinlein at madboa.com <> http://www.madboa.com/
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