DNS forwarding problems

[MS]

Hello,


I've installed and configured DNS on a W2k server sp4. The problem is I
cannot access SOME external websites. I tried accessing those websites
using external (ISP) DNS servers and was able to browse the websites. Any
ideas? thank you in advance.

 

[Kevin D. Goodknecht [MVP]]

In

Hello,


I've installed and configured DNS on a W2k server sp4. The problem is
I cannot access SOME external websites. I tried accessing those
websites using external (ISP) DNS servers and was able to browse the
websites. Any ideas? thank you in advance.

Can your DNS server resolve any external Names?
300202 - HOW TO: Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/?id=300202&FR=1

 

[MS]

Yes it does resolve some.

In

Can your DNS server resolve any external Names?
300202 - HOW TO: Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/?id=300202&FR=1

 

[Kevin D. Goodknecht [MVP]]

In

Yes it does resolve some.

When you run nslookup against it what names does it not resolve?
What message does nslookup give you for the names it cannot resolve?
Does it have a forwarder and what is the forwarder?

 

[MS]

I ran nslookup on mapquest.com

got "Non-Authoritative Answer" and the correct ip address for the site.But
still could not browse the page.

 

[Kevin D. Goodknecht [MVP]]

In

I ran nslookup on mapquest.com

got "Non-Authoritative Answer" and the correct ip address for the
site.But still could not browse the page.

This is a networking issue then.
Hmm, are you connecting through NAT?
Take a look at this and see if this is an MTU issue
http://gw.renner.bei.t-online.de/windowsxp/mtu.htm

 

[Roland Hall]

I ran nslookup on mapquest.com

got "Non-Authoritative Answer" and the correct ip address for the site.But
still could not browse the page.

You should get a Non-Authoritative Answer unless your NSLOOKUP specifies
using MapQuest's name server.

Non-authoritative answer:
Name: mapquest.com
Address: 64.12.181.249

Above this you should also get your Server: FQDN and Address: IP Address

c:\>nslookup -q=ns mapquest.com

Non-authoritative answer:
mapquest.com nameserver = dns-03.ns.aol.com
mapquest.com nameserver = dns-04.ns.aol.com

dns-03.ns.aol.com internet address = 152.163.159.238
dns-04.ns.aol.com internet address = 205.188.157.238

To use their NS server:
c:\>nslookup -q=any mapquest.com dns-03.ns.aol.com

However, AOL doesn't do ANYTHING standard and they will refuse certain
information, in this instance, everything.
Even if you use NSLOOKUP in interactive mode, you will only get a list of
the root hint servers.

--
Roland

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