Nagios communication - NRPE doubt

[akp geek]

Thanks so much Marc..
I did the following

1. I changed the port in /etc/services to 5777
2. I disabled and enabled the service using
        ./svcadm disable  /network/nrpe/tcp:default  and ./svcadm enable
/network/nrpe/tcp:default
3. But I have not changed nrpe.cfg

4. From the nagios server I did the following and it worked
    ./check_nrpe -H 10.112.161.130 -c check_users -p 5777

It worked fine. confusing part is I did not have to change the nrpe.cfg

Any suggestions, why it's working ?

Regards

On Tue, Oct 20, 2009 at 11:53 AM, Marc Powell <marc at ena.com> wrote:

>
> On Oct 20, 2009, at 10:32 AM, akp geek wrote:
>
> > Hi all
> >                   I have a question on how NRPE works. I have
> > installed Nagios on one server1 and Nrpe on server2. they are on the
> > same subnet.
> >
> > the way I execute the commands on the server2 is  Server1:nrpe!
> > commandonServer2
> >
> > It works fine now. both servers are on the same subnet. But if I
> > would like to monitor a server outside the firewall, Is there
> > particular port that needs to be opened or how does that
> > communication work?
>
> Nagios calls check_nrpe locally which contacts NRPE on the remote host
> on the port specified by the check_nrpe command line (look at the
> command{} definition for nrpe). You can change the port that NRPE uses
> in nrpe.cfg on the remote host. You'll also need to change the
> check_nrpe command line to match. If the remote host is behind a
> firewall that restricts access, you'll need to ensure that TCP access
> to that port is permitted.
>
> --
> Marc
>
>
>
> ------------------------------------------------------------------------------
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ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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