Nagios Support Forum

Thank you for the information @cdienger !

Thank you @npolovenko :) Is there further documentation I could use to dive deeper? My current situation is a physical firewall standing between my nagios server subnet and the subnet where one of my target nrpe hosts resides. It would be awesome if i could implement an ACL to allow nrpe traffic in-...

When nagios makes a NRPE query to a host, documentation suggests that by default we're hitting the target host's port 5666. But what's the source port that nagios uses to make this query? When the target host running nrpe replies back to Nagios, what port does the system use? Is it all on 5666? Foun...