[cobalt-users] Diagnosing network freezes on Raq4?

[Paul Warner <pwarner@xxxxxxxxxxxxxxxxxx>]

We have a server that has been relatively imperturbable.  It has stopped
chatting on the net twice in two days.  All internal stuff seems to
continue, as cron continues processing its charges, internally generated
email from logcheck is submitted, the active monitor entries appear in the
appropriate logs, and mrtg seems to continue logging its various datapoints.
We can find no evidence of mischief afoot and there have been no recent
upgrades or installs (or even site additions) on this particular box.

Any pointers on how to figure out what is making it stop responding on all
ports/services?  Also, is there a data corruption risk when rebooting from
the front panel or does it shutdown daemons and filesystems properly?  Now
if I just had a 700 mile pole to push the button with <g>.

Thanks!

Paul