After describing how to get notified of system criticalities via pager I wanted to have my DAPNET transmitters monitored via Nagios. A basic description can be found under . Firstly you need to set up the plugin check_http_json. The source and installation hints can be found on . That enables Nagios to query the DAPNET master using a JSON request and process the result.
A little different to the manual by RWTH Aachen I also configured the hostname of the master in /etc/nagios3/resource.cfg in order to have it not depend on the hostname of the Nagios host.