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NRPE Plugin for Nagios
Copyright (c) 1999-2008 Ethan Galstad (email@example.com)
Last Modified: 09-08-2016
License: GPL v2 with exemptions (-l for more info)
SSL/TLS Available: OpenSSL 0.9.6 or higher required
I have looked into this more and it seems to be an issue with AWS Linux AMI. This instance has an old Linux and kernel, which is not compatible with NRPE version 3.x. The installation failed and nrpe config files weren't working. It didn't recognize nrpe as a and installed service on the system.
So, I installed NRPE v2.15 and I forced version 2 packet only. Now it works and doesn't generate any errors.
I'm not sure if there is any other workaround or fix for the NRPE version 3.x on Amazon Linux but this seems to work for now...