[ILUG] DHCP Server problem - wrong DNS information

[Francis Daly]

On 23/01/2009, Pádraig Brady <P at draigbrady.com> wrote:
> John Hegarty wrote:
>> Ubuntu 7.04
>>
>> A problem has started happening recently where some clients pick up an
>> errant DNS server. Instead of the 192.168.0.254 listed in dhcp.conf they
>> end
>> up with 192.168.1.1 . However the ip address and router address
>> (192.168.0.93) on the clients are not affected.
>
> There must be another DHCP server on the net somewhere?
> 192.168.1.1 is the default address for a lot of embedded devices.
> Have you any access points attached for example with DHCP left enabled?

Yes -- it sounds like you want to find and disable the other dhcp server.

On something linuxy, try files in /var/lib/dhclient to find the dhcp
server that this client used; on something windowsy "ipconfig /all"
will usually list the dhcp server.

If it isn't the machine you expect it to be, then you know where to
start hunting.

Good luck,

	f