monitor hosts behind firewalls

[doug]

In templates I see the initial check_command pointing to
'check-host-alive'. If I comment that out for the boxes behind the FW
how will nagios react? Or must I replace it with as you suggest a 'dummy
check'?

All my monitoring is off-site. I monitor my clients firewalls, servers,
workstations, and some routers if they have static ip. I only need
'check-host-alive' for the routers and firewalls, nothing else.

Can you give me an example of a dummy check?

Thanks

-----Original Message-----
From: mail at catsnest.co.uk
Reply-To: mail at catsnest.co.uk, Nagios Users List
<nagios-users at lists.sourceforge.net>
To: Nagios Users List <nagios-users at lists.sourceforge.net>
Subject: Re: [Nagios-users] monitor hosts behind firewalls
Date: Mon, 6 Feb 2012 10:39:26 +0000



On Mon, Feb 6, 2012 at 2:57 AM, doug <goldcup at ix.netcom.com> wrote:
        Hi Everyone,
        
        I currently monitor various hosts behind firewalls, windows
        servers,
        linux, and some workstations. I have them all setup as active
        hosts that
        nagios pings to indicate they are up. Since they are all behind
        firewalls all I'm doing for host status is in fact just pinging
        the
        firewall. I'm a little confused about using passive checks and
        not sure
        if this is the right way to go about doing what I want. I
        monitor the
        firewall and know that is up, and for all those hosts behind I'm
        just
        pinging the fw, no need to do that. I use nrpe or nsclient to
        monitor
        the services and really that's all I need. Can someone point me
        in the
        right direction so I can stop the active host status pings for
        all hosts
        behind the firewalls.
        


If you dont want to open up ping on the firewalls you could ether have a
dummy hosts check (a check that just returns 0) or have nrpe as the
hosts check (eg a check that just checks if nrpe is responding, again an
nrpe check that just returns 0 )


client nrpe command like this 
command[check_nrpe_alive]=/patch/script/that/returns.0.sh


Nagios command:

define command{
        command_name    check_nrpe_alive
        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -C
check_nrpe_alive
        }
        
define host{
        name            behind_firewall
        use             generic-host
        hostgroups      +behind_firewall
        register        0
}

then a use clause in your host config of behind_firewall

Ritchie
--
<-- http://23.me.uk/2 -->
<--Time flies like an arrow; fruit flies like a banana.  -->
  

 
        Thanks
        Doug
        
        
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