Problemas con check_dchp

[Chris Wilson]

Hi Marc and Luis,

On Mon, 2005-09-26 at 22:57, Marc Powell wrote:

> > From: Luis Gardea [mailto:gardealuis at gmail.com]
[...]
> > My problem is that I want to put in my nagios server the server of
> DCHP,
> > But when I try monitoring I get allway the next error.
> > 
> > [tlacuilo at netids libexec]# ./check_dhcp -s netdns
> > DHCP problem: No DHCPOFFERs were received.
[...]
> > I don't know if the problem are the firewall or toher thing.
> 
> Neither do we really. Can another machine on the same subnet obtain an
> IP address from the DHCP server? Are you running a firewall on the
> machine running check_dhcp that might be preventing DHCP from working?
> Do you see entries in your firewall logs indicating that it's being
> blocked? Does your DHCP server specifically ignore requests from that
> machine?

There is an "issue" with ISC DHCPD (by design I think) which makes it
almost impossible to run a client on the DHCP server - something to do
with listening on the loopback interface and the address space bound to
that interface. I heard that others were able to make it work with some
black magic, but I never succeeded. The short answer is that you can't
check DHCP from the same machine - or at least expect problems if you
do.

How about using check_by_ssh or check_nrpe to execute the DHCP check on
another machine?

Cheers, Chris.
-- 
(aidworld) chris wilson | chief engineer (chris at aidworld.org)



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