Well, as far as I can tell, all the other solutions they could be using suck more, at least adding new modules to nagios is about as easy as writing a script. C

Well, as far as I can tell, all the other solutions they could be using suck more, at least adding new modules to nagios is about as easy as writing a script. Cause that's all you have to do. I've dealt with installs checking hundreds of servers,routers and switches and our only major issue was needing to distribute the checks onto multiple machines. One box will die trying to ping,connect,... onto too many nagios boxes.