[Dnsmasq-discuss] Dnsmasq on a machine that is a DHCP client

[Kaspar Fischer]

Hi everybody,

I have a server in our LAN that runs dnsmasq in order to offer
DHCP to other machines on the LAN. This works usually great, but
sometimes the following happens: On a client machine,

   > ping google.com
   ping: cannot resolve google.com: Unknown host

domain-names are not resolved anymore (but I verified that the
internet itself is accessible: e.g., I can visit Google via
http://216.239.59.103/). On the server itself (the one that
runs dnsmasq), 'ping google.com' works perfectly.

Now, I suspect the following. The server itself uses DHCP to
obtain an external IP and the IPs of some domain-name servers
to use. So my guess is that when these change, dnsmasq does
somehow not realize it and fails. Could this be the cause of
the problem? Does dnsmasq work on machines that our themselves
DHCP clients?

(On the other hand it seems strange that our provider changes
the DNS servers, right? Maybe the problem lies somewhere else?)

Many thanks,
Kaspar