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NSlookup timed out the first time but subsequent attempts work just fine and Slow DNS resolution

Posted on 2009-04-27
Medium Priority
Last Modified: 2012-05-06
I have a server running windows 2003 which is set up as a domain controller. It's domain is sandpit.com and I find that when I perform an NSlookup for an external domain name like Cisco.com that it will initially time out but subsequent attempts work ok. Also I find that the DNS resolution on connected clients takes a long time.

My primary DNS resides at Zoneedit.com. I have set up the dns on the server to be a stub for sandpit.com. I am pretty sure the problem is related to the DNS setup because I am not very experienced with DNS.

I have included a screen dump of the DNSmgmt screen.

Please help me resolve this.


Question by:svelletri
  • 3
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LVL 71

Accepted Solution

Chris Dent earned 2000 total points
ID: 24243227

Hey Steven,

Forwarders have to be the first thing to question. Open up the Properties for the server in the console there and select the Forwarders tab. Anything listed?

If there is...

First step is to get rid of them and see how it performs using Root Hints (which is the default, it uses the contents of the Root Hints tab to find its way).

If you find things work a lot better without those Forwarders you have two choices:

1. Continue with Root Hints
2. Confirm the list of Forwarders with your ISP / Host / whatever else you might have to connect to the internet



Author Comment

ID: 24245924
Hi Chris,

Yes that seemed to work just fine thank you.

When you say forwarders do you mean my ISP's dns servers?
LVL 71

Expert Comment

by:Chris Dent
ID: 24248527

Yep. Was that what you had there?


Author Comment

ID: 24249941
Hi Chris,

No I had a bogus address there. Now that I added the ISP's DNS servers things are working swimmingly.

Thanks again!

Author Closing Comment

ID: 31575004

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