Is there a way to monitor ports on our ZCS box (5.01, running on Ubuntu 6.06.2 Dapper Drake) so that we can tell if it stops responding on, say, port 465 or other common ports? Maybe through a configuration of the SNMP service? The documentation I found wasn't very clear on how to leverage this to monitor the Zimbra server's health and status.
The reason we want to do this is that we occasionally find that the server stops listening on those ports--the web portal works, but mail clients can't send or receive mail, and restarting services resolves the issue. We'd like a way to proactively monitor this, though, so that we can be warned if the server stops listening, rather than letting frustrated users do the monitoring for us