Nagios plug-in for monitoring ISC DHCP

Joe Vitti jvitti at
Sun Mar 18 01:11:32 UTC 2012

This should be possible.

You setup the nagios server as a host with a service for check_dhcp in the nagios config. This will make it monitor itself. You might need the nrpe client setup as well.
Joe Vitti
Network and Systems Administrator
GCInfotech | 2009 Summer Street | Suite 302 | Stamford, CT 06905
p: 203.463.7209 | e: jvitti at

On Mar 17, 2012, at 9:07 PM, Loren M. Lang wrote:

> I am using a Nagios plug-in called check_dhcp to monitor both my DHCP servers.  It works by broadcasting a DHCPDISCOVER message and monitoring any DHCPOFFERs.  It reports back a Warning status if not all DHCP servers respond and a Critical status if no one responds.  The problem I am having is that the Nagios server is running on the same hardware as one of the DHCP servers and it does not seem to respond to the DHCPDISCOVER.  I can successfully run the plug-in on a separate computer to get it to respond, but I'd like to test it from the same server running all the Nagios checks.  Is it possible to send a DHCPDISCOVER to the daemon running on the same computer without using a separate network card tied to the network?
> -- 
> Loren M. Lang
> lorenl at
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