Remote terminal sessions lock up and daemons flake out

Nathan Kinkade nkinkade at
Thu Oct 7 08:54:54 PDT 2004

On Thu, Oct 07, 2004 at 09:31:26AM -0500, Danny Howard wrote:
> This last problem has started to happen only lately.
> I log in from my FreeBSD workstation, on an xterm, via ssh to a remote 
> machine running 4.9.  I often sudo -s.  I'm using tcsh.  Lately, I leave 
> the session for a while and come back and the session is locked up.  I 
> can't exit or anything.  I kill the xterm and restart.  I reconnect to 
> the box, and there's no hanging session ... any advice?
> Possibly related.  This is a Plesk box.  The httpd and spamd frequently 
> fail.  I've got a duct-tape script in cron to check these demons and 
> restart.  Pointers on where I might look, perhaps in sysctl, to pinpoint 
> what might be happening?
> Thanks,
> -danny

Could this be an idle-timeout on the server and the connection isn't
closing properly?  Perhaps you are behind some sort of stateful firewall
that drops dynamic rules after a certain period of idle time?

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