Nagios Support Forum

Dear Team:

Based on the Article Number: 519 "NRPE - v3 Enhanced Security" I am trying to implement SSL in the communication between my Nagios Core 4.3.4 and my Debian 8.8 unsuccessfully. The NRPE versions are the following:

Nagios Core (IP: 192.168.10.101):
NRPE Plugin for Nagios
Copyright (c) 1999-2008 Ethan Galstad ([email protected])
Version: 2.15


Debian (IP: 192.168.10.111):
NRPE Plugin for Nagios
Version: 3.2.1

It seems that you do not recognize the options of the certificates I use:

[root@localhost libexec]# ./check_nrpe -A /usr/local/nagios/etc/ssl/ca/ca_cert.pem -C /usr/local/nagios/etc/ssl/nagios_server_certs/nagios_server.pem -K /usr/local/nagios/etc/ssl/nagios_server_certs/nagios_server.key -H 192.168.10.111
./check_nrpe: invalid option -- 'A'
./check_nrpe: invalid option -- 'C'
./check_nrpe: invalid option -- 'K'

...

I make a clarification, NRPE works correctly between both when I DO NOT use SSL.

It will be a problem of NRPE versions?
Thank you very much for your help!

Dear Team:

It was indeed a problem with the NRPE plugin version, I just updated to version 3.2.1 and it works correctly!
Attached commands:

[root@localhost nrpe-nrpe-3.2.1]# cd /usr/local/nagios/libexec/
[root@localhost libexec]# ./check_nrpe -A /usr/local/nagios/etc/ssl/ca/ca_cert.pem -C /usr/local/nagios/etc/ssl/nagios_server_certs/nagios_server.pem -K /usr/local/nagios/etc/ssl/nagios_server_certs/nagios_server.key -H 192.168.10.111
NRPE v3.2.1
[root@localhost libexec]# ./check_nrpe -A /usr/local/nagios/etc/ssl/ca/ca_cert.pem -C /usr/local/nagios/etc/ssl/nagios_server_certs/nagios_server.pem -K /usr/local/nagios/etc/ssl/nagios_server_certs/nagios_server.key -H 192.168.10.111 -c check_load
OK - load average: 0.08, 0.02, 0.01|load1=0.080;0.150;0.300;0; load5=0.020;0.100;0.250;0; load15=0.010;0.050;0.200;0;
[root@localhost libexec]#

Thank you very much to all!

Sounds good! I'll be closing this thread!

If you have any more questions, feel free to create another thread.

Thanks for using the Nagios Support Forum!