I’m not doing something right with the DHCP monitor. I’ve tried configuring OpenNMS to detect DHCP services on the network a handful of times over the last decade but have never been successful.
I’ve checked and UDP port 67/68 is not in use, the OpenNMS server itself has a static IP. I believe I added the parameters correctly to the poller-configuration file for DHCP broadcast detection. The DHCP service I’m interested in monitoring is in the same broadcast domain as the OpenNMS server but DHCP is never detected.
I was actually hoping to use this monitor to detect potential rogue DHCP servers on the network.
Is there some magic button I am forgetting to turn on in order for OpenNMS to detect and monitor DHCP services?
Is there DHCP logging I can monitor at the server perhaps?