inbound ssh ceased on 4 servers at same time

Glenn Dawson glenn at
Sat Jun 4 19:57:07 GMT 2005

At 09:05 AM 6/4/2005, you wrote:
>Yesterday at about noon, all four freebsd servers on a clients lan
>quit accepting ssh connections. All were running 4.11-release-p4,
>and had been cvsup'd at the same time from cvs-10, cvs-11, or
>cvs-12. Outbound ssh (from console of the affected boxes) works as
>expected, both to local openbsd boxes and to remote locations.
>There are no host based firewalls involved, and all other network
>services are operating correctly. Netstat shows port 22 as listening.
>At 11:20 am (40 minutes earlier), ssh was working properly on all boxes.
>Has anybody encountered a situation like this before?

Not specifically, but the first things I would check:

is sshd running on the affected machines?

when trying to connect to the affected machines, do the clients give any 
error messages?  or does the connection just time out?

are there any relevant entries in the log files on the affected 
machines?  specifically /var/log/messages and /var/log/auth.log

are the affected machines using the same name server? and if they are, can 
the affected machines do forward and reverse lookups for the IP of the 
system you are trying to connect from?


>John Brooks
>john at
>freebsd-questions at mailing list
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