AliveMon

AliveMon is a network monitor that lets you know when servers or routers fail. Configurable alarms enable you to quickly solve problems before they turn into real headache. You can even automatically take corrective actions by auto-starting programs. Application-specific probes let you check the actual status of your application (like web or game servers). Many other tools just do a ping, which only lets you known if the system itself is powered on. But ping won't tell you if the web server is really alive. Only an app-level probe can do this.

Save a lot of time: no more periodic checking necessary. Simply configure AliveMon and forget about it. AliveMon will let you know when it is time to look at the system.