DNS Forwarders question

SBS 2003 Standard (1 nic)

All users use server for DNS. Forwarders are our ISPs. Almost all web
sites work just fine. Yahoo and a few others will not resolve. On the
server, nslookup fails for www.yahoo.com. If I change nslookup server to
the ISPs DNS, Yahoo resolves just fine?? Any ideas? Hunches?

This ia problem that effects me as well. I get intermittent DNS resolution
while using the windows DNS forwarders to the ISP, but get a much better
service when I point the Internet Nics DNS direct to the ISP rather than back
to the internal DNS and use the forwarders.

I've applied the DNSS0
(http://support.microsoft.com/default...b;en-us;828263) patch and
this issue appeared to get worse after this.

"Fredly" wrote:

> SBS 2003 Standard (1 nic)
>
> All users use server for DNS. Forwarders are our ISPs. Almost all web
> sites work just fine. Yahoo and a few others will not resolve. On the
> server, nslookup fails for www.yahoo.com. If I change nslookup server to
> the ISPs DNS, Yahoo resolves just fine?? Any ideas? Hunches?
>
>
>

Bummer.

How about adding a second DNS entry on the cards. One for internal DNS, one
for the ISP? Will this cause internal DNS issues? i.e. the server doesn't
respond fast enough to an Exchange server request, it moves to ISP DNS...


"Fredly" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> SBS 2003 Standard (1 nic)
>
> All users use server for DNS. Forwarders are our ISPs. Almost all web
> sites work just fine. Yahoo and a few others will not resolve. On the
> server, nslookup fails for www.yahoo.com. If I change nslookup server to
> the ISPs DNS, Yahoo resolves just fine?? Any ideas? Hunches?
>
>

Hi Fred,

DNS on the servernic(s) should **only** point to the server IP. The ISP DNS
numbers are being put in the tab Forwarders of your DNS server automagically
when CEICW is run.
If those DNS numbers are not working properly, you can try to remove the
forwarders there.
Else:

832223 Some DNS Name Queries Are Unsuccessful After You Upgrade Your DNS
Server
http://support.microsoft.com/?id=832223

828731 An External DNS Query May Cause an Error Message in Windows Server
2003
http://support.microsoft.com/?id=828731

828263 DNS query responses do not travel through a firewall in Windows
Server
http://support.microsoft.com/?id=828263


--
Regards,

Marina
Microsoft SBS-MVP
One of the Magical M&M's

"Fredly" <(E-Mail Removed)> schreef in bericht
news:(E-Mail Removed)...
> Bummer.
>
> How about adding a second DNS entry on the cards. One for internal DNS,
one
> for the ISP? Will this cause internal DNS issues? i.e. the server
doesn't
> respond fast enough to an Exchange server request, it moves to ISP DNS...
>
>
> "Fredly" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > SBS 2003 Standard (1 nic)
> >
> > All users use server for DNS. Forwarders are our ISPs. Almost all web
> > sites work just fine. Yahoo and a few others will not resolve. On the
> > server, nslookup fails for www.yahoo.com. If I change nslookup server
to
> > the ISPs DNS, Yahoo resolves just fine?? Any ideas? Hunches?
> >
> >
>
>

I would disable EDNS0... Check KB828263 and run "dnscmd Server Name/Config
/EnableEDnsProbes 0".

--
Javier [SBS MVP]
www.msmvps.com/javier
<< SBS ROCKS!!! >>

"Fredly" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> SBS 2003 Standard (1 nic)
>
> All users use server for DNS. Forwarders are our ISPs. Almost all web
> sites work just fine. Yahoo and a few others will not resolve. On the
> server, nslookup fails for www.yahoo.com. If I change nslookup server to
> the ISPs DNS, Yahoo resolves just fine?? Any ideas? Hunches?
>
>

I have also been experiencing this problem for some time now, and I long ago
disabled EDNSO. Very frustrating.
"Fredly" wrote:

> SBS 2003 Standard (1 nic)
>
> All users use server for DNS. Forwarders are our ISPs. Almost all web
> sites work just fine. Yahoo and a few others will not resolve. On the
> server, nslookup fails for www.yahoo.com. If I change nslookup server to
> the ISPs DNS, Yahoo resolves just fine?? Any ideas? Hunches?
>
>
>