Local firewall changes on Nagios core server

[Jerry Joy]

Thanks Assaf and Jim for the detailed response.

Assaf - We need to keep the local firewall ON as per policy

Jim - SELinux is disabled on the server so saved from the SElinux trouble.

On Mon, Feb 22, 2010 at 6:39 PM, Jim Avery <jim at jimavery.me.uk> wrote:

> On 22 February 2010 09:06, Jerry Joy <jerryapr7 at gmail.com> wrote:
> > Hi,
> >
> > I have setup a Nagios server on RHEL 5 and it has the local firewall
> "ON".
> > What exactly are the changes required on the local firewall so that
> Nagios
> > core server is able to accept reports from NRPE and NSClient++ agents. I
> > don't see a fixed port used by Nagios core.
> >
> > Thanks,
> > Jerry
>
> The Nagios server will pull check results using nrpe so you shouldn't
> need to open a specific port.
>
> Likewise, usually the Nagios server will query the NSClient++ agent
> either using the same nrpe protocol or using the check_nt protocol in
> which case you also shouldn't need to open a specific port.  However,
> if you have configure NSClient++ to send check results to Nagios using
> the NSCA protocol, you will need to configure the nsca daemon on your
> Nagios server to receive these checks and forward them to Nagios.  The
> port the nsca daemon listens on is configurable - by default it's port
> 5667.
>
> Another problem I have seen in the past with RedHat variants of Linux
> is that SELinux can be a right pain to configure to get things like
> nsca working.  I used to disable SELinux, but now I tend to use Debian
> derived versions of Linux rather then RedHat so don't see this
> problem.
>
> hth,
>
> Jim
>
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