The ping monitor simply tests if a server is online and responding by sending ICMP echo request packets and listening for the appropriate response. While this is a good general server test, responding to pings does not necessarily mean that your site is online and functioning correctly, only that the server hosting it is online. If you just need to know if your server (or router, firewall or many other types of networked device) is online then a ping test is ideal, otherwise you may prefer to use our HTTP or HTTP+Keyword tests.
Due to the increasing use by ISP's of filters or blocks of icmp traffic, ServerMojo will attempt to ping the icmp echo port and the www/HTTP port to ensure a higher chance of a successful ping test.
All that is required for a ping monitor is an IP address or valid hostname.