Monitoring TCP connection/port to other remote hosts from my monitored host (running check_mk_agent)

General
1

I am working on migrating some old, mostly manual monitoring scripts to CMK and I got stuck trying to add a simple TCP connection or just some remote machine’s port availability monitoring.

Looking around the docs I think this is the closest to what I want

but this is, as far as I can tell, monitoring the monitored host’s own ports, basically the netstat command.

I know I could rewrite my bash script (it is pretty much just a grepped output of a netcat command like nc -vz 1.2.3.4 1234), but I was wondering if there is any native solution/service/plugin I could choose instead.

2

check_tcp would be a good fit here. You can use MRPE to run the TCP check from Host A towards Host B.
The TCP check on Host A will be executed by the Checkmk agent.

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3

Thats not how it works. An Active is run on the checkmk server and is targeting the server(s) you have for the rule and will do exactly what you want

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