DNS Issue with outside website on random machines.

[jmair]

I'm having issues with a few domains that I know of. Specifically connecting to wildblue.net. I have several teachers unable to connect to the site. I am able to on my computer and on the domain controller without a hitch.

When I go to the client machines that are unable to connect and run an ipconfig /all, I see my domain controllers ip as primary dns on the client machines and nothing else. In fact, it looks solid and no different than mine. I've then run and ipconfig /flushdns , ipconfig /registerdns. I just received an email from somebody at wildblue.net saying that they haven't been able to receive any of our emails.

 

 

The DNS listed on the NIC of the DC are Primary: 10.1.1.2 (my domain's dns) and nothing else.

 

Any suggestions on where to look for what's causing this?

[glennda]

what happens if you run an nslookup wildblue.net from both the client and the server?

[jmair]

from client and server right now.

can't find, server failed

 

Note: When I created the post both mymachine and the server could access the site, now I can't.

 

(should have waited until I was off the phone to reply to this correctly...)

Here is the complete readout of the nslookup wildblue.net

 

Server: como2010.parkcounty.int

Address: 10.1.1.2

*** como2010.parkcounty.int can't find wildblue.net: Server failed

Edited September 22, 2011 by jmair

[Michael]

So how is your server making outside requests?

 

So for example a user types bbc.co.uk, the request is sent to your server, then your server should send the request to an external DNS server, be it your ISPs or LAs, it doesn't matter.

[glennda]

assume server can lookup other addresses? who do you forward your dns requests to? if you do nslookup wildblue.net xxx.xxx.xxx.xxx replacing the xxx.xxx.xxx.xxx with the ip of the dns servers you forward to

 

do you get any response? if not try nslookup wildblue.net 8.8.8.8 (googles dns server)

 

 

EDIT - this will explain how you can check what is setup to forward to

 

http://technet.microsoft.com/en-us/A/cc754941.aspx

Edited September 22, 2011 by glennda

[jmair]

First off, thanks for the replys guys.

 

I was always under the impression that the DNS server would get DNS requests from the Gateway. This is where my external (ISP) DNS IPs are stored. Am I supposed to have them somewhere else on my DNS server?

[jmair]

DNS Forwarders were empty.. I must have removed them when I was trying to brake my network I guess. Arrg.. Thank again guys.