<HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1400" name=GENERATOR></HEAD> <BODY style="MARGIN: 4px 4px 1px; FONT: 10pt Tahoma"> <DIV>I've completed the setup of a Nagios system to monitor a number of our internal systems, and it seems to be working great. Now I want to setup a system at a remote site to monitor the monitor! All I want this second system to do is alert me when the first system goes down. Of course, I would also monitor the second system from the first. Complicating this is the fact of a firewall between the two systems - for instance, I can't run check_ping because the firewall stops it. And I can't use a VPN. </DIV> <DIV> </DIV> <DIV>So, can anyone recommend a reliable set of checks to run that will monitor the monitors and pass through a firewall?</DIV></BODY></HTML>