RE: DNS problems

["Andy Laurence" <andy@xxxxxxxxxxxxxxxxxx>]

Martin Howell wrote:
> This is sorta HA related, honest guv.  I have a USR
> router/modem on my ADSL line, it does DNS, DHCP, and
> firewall, and has worked perfectly for the last 9 months with
> my home network of around 6 - 8 PCs.  Installed a Windows
> 2003 server a short while back, router now goes titsup at
> least once, and sometimes several times a day.  When it falls
> over, I can ping IP addresses on the 'net, but not www.
> addresses, so I am assuming that there is something in the
> DNS setup on the server that interferes with the router.  So,
> turned off the AD on the server, and the Microsoft DNS with
> it, problem is still there.  Disconnect the server from the
> network, the router is as solid as a rock - re-connect, and
> it falls over again..
>
> USR helpfully thanked me for buying the product, then told me
> that they don't support 2003 server.  The Microsoft forums
> all assure me that the server must be ok, and that I should
> change the router for another as its clearly at fault:
> thanks, Mr Gates, I don't think so.  My ISP
> (f2s.com) are a lot more helpful, but its still broke.  I'm
> clean out of ideas..
>
> Any suggestions for a fix?  Pretty please??

Is it possible that the W2k3 server is handing out poorly configured DHCP?
If it's doing DHCP, it'll set itself as the default DNS.  It also may not
resolve Internet DNS.  Do an "ipconfig /all" on one of your
clients when the
server is plugged in and when it is not.  Do the results differ?

Cheers,
Andy
--
http://www.andylaurence.co.uk