Nagios Support Forum

How do I verify if the Linux NRPE agent is running on the Centos 7.x machine that is being monitored?

And how do I modify the "allow" IP address for the NagiosXI Server because I have installed NagiosXI on a different server?


thanks,
ik.

Hi @ikekim,

To check if NRPE is running , run the command And to modify allow IP on the nagios xi server you will have to go to nrpe configuration file
cd
like so.. Look for this line and then add your IP like so...

Hi dwasswa ,

the command doesn't tell me if the service is running.

[root@centos-min2 ~]# service nrpe status
Redirecting to /bin/systemctl status nrpe.service
Unit nrpe.service could not be found.

I also looked at the /usr/local/nagios/etc/nrpe.cfg , but interestingly, I don't see the original INagios XI P address which the install script prompted for me to eneter.


thank,
ik

Most probably NRPE is running under xinetd. You can view the nrpe config by running:
Try:

I tried: and it returned:
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
flags = REUSE
socket_type = stream
port = 5666
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nrpe
server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
log_on_failure += USERID
disable = no
only_from = 49.27.73.92
}

So in following your instructions I have to modify the line "only_from = new ip address"?

If yes, can I add multiple IP addresses in case I'm using more than one Nagios XI Server?

thanks.

Yes,you can add multiple IP addresses.

Sorry I got to ask in what format do I need to provide the multiple IP addresses?

Are the values separated by space, comma, semi colon, etc?

example of multiple ip addresses(Nagio XI servers) like this ?

only_from = 192.168.1.10, 192.168.9.11


thanks.

@ikekim They need to be separated by space, no commas in-between. After modifying /etc/xinetd.d/nrpe file, restart your nrpe by running .
Let us know if that worked.