DHCP error just came back

[benningtonr]

I just started getting:

CRITICAL: No DHCPOFFERs were received.

at the command line with

[ronb@nagios libexec]$ service iptables stop
[ronb@nagios libexec]$ ./check_dhcp
CRITICAL: No DHCPOFFERs were received.
[ronb@nagios libexec]$ ./check_dhcp -s 192.168.99.73
CRITICAL: No DHCPOFFERs were received.

[nscott]

Sounds like your DHCP server isn't working properly, are you sure this isn't what Nagios is for? Has the Nagios server's MAC been blacklisted for too many DHCP requests?

[benningtonr]

I have just looked at the DHCP server again, and there are no problems. The event logs are clean, and it has over 100 addresses available.
Besides i have dhcp set up for an 8 hour turn around, due to the large amount of visitors we get.
So if it was not working, i would hear about it, quickly.
Anything else we can check in nagios?

[scottwilkerson]

It could be iptables blocking access

Run the following

Code: Select all

iptables -I INPUT -i eth0 -p udp --dport 67:68 --sport 67:68 -j ACCEPT

[benningtonr]

ok, that worked, What would have caused iptables to start blocking again?
I had run that before and it has been working fine.

[scottwilkerson]

not really sure why they wouldn't stick. Have you changed anything? Installed new software?

[benningtonr]

maybe, i am always tweaking Nagios, love the software, just need to learn more.