Installing NRPE agent on a DMZ server

[MSPk]

Hi Team,

To successfully check a service on a remote server in DMZ, should the port 12489/5666 be opened bi-directionally? or opening the ports uni-directional is fine?

[tmcdonald]

I'm not entirely sure if NRPE & Co. use the same port for outgoing as incoming, but in any case your firewall should allow outgoing established/related connections and that should take care of it.