When nagios makes a NRPE query to a host we know we want to hit the target host’s port 5666.
But what’s the port that nagios uses to make this query?
When the target host replies back to Nagios, what port does the system use?
Is it all on 5666?
Found a few documents online such as the below but not sure if this is the answer to what I’m looking for.
Thanks in advance for your insights.