For one of TCS's client we have configured Nagios and a host of other GPL'ed applns top aid him in Network Monitoring as part of a very large project. This last problem has me stumped.
In my network consisting of purely AIX/Gnu-Linux/HP-UX i have to provide a single console for monitoring all logs and trigger an alert/alarm as soon as a particular message comes up in the logs. These logs will be both system and application logs and hence the messages to be tracked has to be customisable.
We use nagios, HP OV and Big Brother for monitoring our servers. So far Big Brother is the best that I have seen in terms of monitoring and sending emails/pager warnings.
Regards, Keith