Sentinel is a network monitoring utility for ISP's, IT departments, data centers, and universities. Sentinel is a multithreaded application allowing it to independently, accurately test multiple protocols on multiple servers. Sentinel email notification options allow you to send fault notification to anyone on the internet. The email contains fault information as well as trace route information to help you diagnose the cause of the fault. The subject line contains most of the pertinent information making this feature perfect for text pagers!