> 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.
On the machine(s) with the bogus DNS server, look in the arp table for the
MAC address of 192.168.1.1. Take this to your switch and (if you're using
a managed switch) it should be able to tell you what port that MAC is
visible on. Follow the cable from there...
-Ronan
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