Kevin, Jorge,
Many thanks for your thoughts. Unfortunately I've been here before:
- IP filtering on the connection is NOT ENABLED
- RRAS is disabled - although it had previously been running.

I'm wondering if there's someting left over from RRAS that may be causing
this?

Thanks again,
Peter

"Jorge Silva" wrote:

> Hi
>
> If both servers are in the same lan and no FW configured between them you
> must have something else between them, please recheck again your
> configuration antivirus, any third party tool installed on the servers.
>
> --
> I hope that the information above s you
> Good Luck
>
> Jorge Silva
> MCSA
> Systems Administrator
>
> "PeterR" <PeterR@discussions.microsoft.com> wrote in message
> news:652F567B-0936-47FB-B26B-226B24A00F1D@microsoft.com...
> > My W2K3 DNS responds to TCP queries, but not UDP. It appears that
> > something
> > in the O/S is filtering/blocking UDP/53 to the DNS server, but I have no
> > idea
> > what. I've determined this by turning on the DNS debug log - no query is
> > received.
> > Situation:
> > - Standalone (workgroup) machine with IIS and a few other bits installed.
> > No
> > DHCP or WINS
> > - Windows Firewall disabled
> > - Will answer using nslookup on machine itself, but not from another
> > machine
> > in the same LAN segment - no firewall/router in between.
> > - Public IP address
> >
> > I've searched everywhere for an answer but so far no clue. I've even
> > changed
> > to a 3rd-party DNS server, which exactly the same results.
>
>