ActiveXperts Network Monitor monitors servers and workstations for availability. It monitors all aspects of your lan and wan servers, workstations and other network devices. When problems are detected, the system automatically notifies you by network message, e-mail, pager, or SMS message, before problems get out of hand. When a failure is detected, it tries to recover the problem by running a system administrator defined program. The system has a number of built in checks and supports Windows, UNIX, Linux and Novell platforms. This runs as a service on windows NT/2000/XP/2003 platform.