I'll give you a small list of tools - while I would personally recommend Nagios simply as I am used to it. It comes with a big user base, good collection of plug-ins etc - but I've heard good things about Icinga as well.
I'll give you a small list of tools - while I would personally recommend Nagios simply as I am used to it. It comes with a big user base, good collection of plug-ins etc - but I've heard good things about Icinga as well.