Open question, since I haven't really seen it mentioned in the documents.
Does OEM (using 188.8.131.52.4 currently) have the ability to probe a port on a host-target to make sure it's responding? the example is:
pick a host-target (ie. myappserver.private.network.com)
specify a port or range
.. and OEM would check it for uptime as a parameter status.
Bonus points: it tracks history and uptime.
I would imagine it is a Metric Extension (aka User-defined Metric in the old parlance) but if someone could point me to a concrete example or advice on how they do it in their environment, that would be appreciated.
The alternative would be to create a simple port-probe bash script to do it.