So these are my notes on setting up Nagios 1.2 on Mac OS X Server 10.3.5. If nothing else, it'll add to the Google Database. Nagios, for those unfamiliar with it, is an open source network monitoring application, ala Intermapper, or Lansurveyor. (Although if you don't know what Nagios is to begin with, you're going to want to check out the Nagios site before you do all the work I talk about here.) Note, this is not with MySQL support compiled in, since that's going away in favor of an n-tier structure. There are a few requirements for Nagios, namely zlib, libpng, libjpeg, and GD lib. if you have current versions of them already, you're golden. otherwise, follow the appropriate steps (If you're installing this on a stock Server setup, you don't have them). You also need Apple's Developer Tools, otherwise you have nothing to compile with. All of this is from my experience installing this on a G4 Tower running Server 10.3.5 and now into the breach...

Nagios is great. Here's how to set it up on OS X, instead of the typical Linux.