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Nagios monitoring ok but SSL Handshake error
Posted: Thu Jul 07, 2016 11:45 pm
by jim
Good Folks,
I have a weird situation here. My remote linux server is nice monitored by Nagios but when I try to run check_nrpe -H <Nagios Server> I get SSL Handshake error. I don't the same error from Nagios server.
Code: Select all
[root@agent1 ~]# /usr/local/nagios/libexec/check_nrpe -H master
CHECK_NRPE: Error - Could not complete SSL handshake.
The error message in /var/log/messages file of Nagios Server is Jul 8 21:43:57 puppet nrpe[8648]: Host 192.168.1.3 is not allowed to talk to us!
When in fact Nagio server IP is defined in allowed_hots at /etc/xinetd.d/nrpe file on Linux remote server(agent1)
[root@agent1 ~]#
[root@master ~]# /usr/local/nagios/libexec/check_nrpe -H agent1
NRPE v2.15
[root@master ~]#
Any idea how to resolve it?
Re: Nagios monitoring ok but SSL Handshake error
Posted: Fri Jul 08, 2016 9:30 am
by mcapra
So you are, from the remote server (agent1), trying to run check_nrpe on the Nagios server (master)? I would make sure that both server's have eachother in the
allowed_hosts definition.
Refer to Section III of this document (and this document in general for NRPE issues):
https://assets.nagios.com/downloads/nag ... utions.pdf
What are you trying to accomplish by doing this?
Re: Nagios monitoring ok but SSL Handshake error
Posted: Sat Jul 09, 2016 1:42 am
by jim
What are you trying to accomplish by doing this?
Don't we check that nrpe is working properly running
Code: Select all
/usr/local/nagios/libexec/check_nrpe -H <remote server hostname or IP>
I have never seen/heard that remote serve IP should be in nrpe.cfg file, by adding it also I get same error.
Re: Nagios monitoring ok but SSL Handshake error
Posted: Sat Jul 09, 2016 4:21 am
by jim
Yes, I do agree with you that we need to have IP's for allowed_host however I find that it works only when you compile with ssl headers like below.
It is given in the link you mentioned so all good
Re: Nagios monitoring ok but SSL Handshake error
Posted: Mon Jul 11, 2016 9:04 am
by mcapra
Thanks for sharing your solution! Is it alright if I lock this thread and mark the issue as resolved?
Re: Nagios monitoring ok but SSL Handshake error
Posted: Mon Jul 11, 2016 5:51 pm
by jim
Yes please go ahead