The problem seems to be that check_ircd is attempting to bind to the interface that goes with the machine's primary hostname. In many cases that's not correct. I was also getting this error if I had my hostname assigned to 127.0.0.1 in /etc/hosts, but removing that caused a timeout. This is because my monitoring host has interfaces on several vlans, and without the entry in /etc/hosts, the...
2009-09-18 06:32:23 UTC in Nagios Plugin Development