openNMS newbie here. Got it installed and (a bit) configured, pointed it at a simple file server, and super pleased to see “your filer is happy responding to ssh & http”. Great.
Pointed it at the pfSense firewall, and hoo boy. It’s done some sort of discovery or scan, and it’s reporting on all the VLANs configured on this box, including some test systems that are going up and down deliberately (so it makes no sense to monitor these systems).
When I’m adding a node like this firewall (or any of the other network devices I’d like to monitor), how do I limit the scan or discovery that happens by default? I want to just know if this box is happy passing traffic; I don’t want to know the status of all the boxes it’s serving (yet!).