check_dhcp on localhost

[Marc Powell]

> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net [mailto:nagios-users-
> bounces at lists.sourceforge.net] On Behalf Of Jan Kohnert
> Sent: Monday, June 26, 2006 10:52 AM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] check_dhcp on localhost
> 
> Hello folks,
> 
> I got Nagios-1.4.1 on Gentoo up and running using the fine
documentation
> and
> the template config files which I could easily edit to fit my needs.
> 
> But I ran into trouble with one single service:
> I do:
> server ~ # /usr/nagios/libexec/check_dhcp -v -s localhost -i eth0
> DHCP socket: 3
> Hardware address: 0050223937b4
> DHCPDISCOVER to 255.255.255.255 port 67
> DHCPDISCOVER XID: 162470487 (0x9AF1A57)
> DHCDISCOVER ciaddr:  0.0.0.0
> DHCDISCOVER yiaddr:  0.0.0.0
> DHCDISCOVER siaddr:  0.0.0.0
> DHCDISCOVER giaddr:  0.0.0.0
> send_dhcp_packet result: 548
> 
> 
> 
> 
> No (more) data received
> Result=ERROR
> Total responses seen on the wire: 0
> Valid responses for this machine: 0
> DHCP problem: No DHCPOFFERs were received.
> server ~ #
> 
> but at the same time in my logs:
> Jun 26 17:42:44 server dhcpd: DHCPDISCOVER from 00:50:22:39:37:b4 via
eth0
> Jun 26 17:42:45 server dhcpd: DHCPOFFER on 192.168.0.236 to
> 00:50:22:39:37:b4
> via eth0
> 
> I tested on another host on my LAN and it works just fine. But that is
not
> a
> solution for monitoring, because non of this clients is up all the
time
> and I
> want the services to be checked 24x7.
> 
> So I searched the web for a solution but I only found a french forum
at
> wich
> this was once discussed. Unfortunately I don't speak french. ;)
> 
> So I'd like to ask your help:
> Is it possible to monitor a dhcp server which is running on the same
> machine
> as nagios? And if yes, how to do that? Add a iptables rule to route
back
> the
> DHCPOFFER or should it work out of the box?

I don't use check_dhcp myself but according to this post it's a
limitation of dhcpd. It seems like a good thing to me for the DHCP
server not to give itself a lease ;) I can't narrow my search enough
with google to find relevant information but perhaps you'll have better
luck.

http://article.gmane.org/gmane.network.nagios.user/33977/match=dhcp+mach
ine

--
Marc

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null