dchpd errors - are these to do with DNS?

[Kevin Darcy]

Henry Law wrote:

>[I'm running Smoothwall in fact; tried the Smoothwall group but got no
>answer so I'm down to debugging the components myself...]
>
>For those who don't know, Smoothwall runs dhcpd on the local network,
>and dnsmasq to provide DNS forwarding from the ISP.  I recently
>changed the address range of my local network to 174.24.0.192/26 and
>since then I'm getting continual entries in the logs of this form:
>
>"11:04:42 dhcpd DHCPOFFER on 172.24.0.240 to 00:00:21:26:1a:7e
>(main-atx) via eth0
>
>"11:04:42 dhcpd if IN A main-atx. rrset doesn't exist add 1800 IN A
>main-atx. 172.24.0.240: timed out.
>
>"11:10:50 dhcpd DHCPINFORM from 172.24.0.240 via eth0: not
>authoritative for subnet 172.24.0.192
>
>(Apologies for folding: those are three successive lines).  Research
>suggests that, rather than being anything to do with DHCP these are
>actually dns or ddns messages, associated with dnsmasq, but I don't
>have ddns running.   And despite these messages DHCP and DNS continue
>to work flawlessly!
>
>Can someone confirm or refute the hypothesis that these are
>dns-related messages, and if so point me in the right direction to
>resolve the problem?
>
>[Apologies if this is a duplicate; the original is not on my news
>server and I've checked Google groups to confirm that it's not there
>either]
>
The second message is definitely DNS-related. It indicates that your 
DHCP server is trying to update DNS, despite your claim that you "don't 
have ddns running". Re-check your DHCP server configuration.

- Kevin