Solved

Small Business Server 2003 - Slow DNS

Posted on 2009-05-09
5
241 Views
Last Modified: 2013-11-05
I just installed a new SBS 2003 server (Dual Xeon 2.4  GHz and 4 GB RAM) and made it the gateway between the LAN and the outside world (public IP on the External Network NIC).  The office consists of approximately 15 PCs.  Obviously the SBS server is a DC, but the PCs all currently run XP Home, so none of them can join the domain.  This will be corrected a few PCs at a time over the next 6 months or so, but cannot be corrected immediately.  Since installing the SBS server and making it the sole DNS server on the desktops, internet connectivity has been incredibly slow.  It takes forever for a page to begin to load.  Once it finally started actually loading it seemed to load quickly.  I finally tracked this down to being a DNS issue.  On a client, if I do an "nslookup www.cnn.com" for example, I comes back in about 2-3 seconds and says it lists the server as the DNS server that it checked with, but says it couldn't resolve the address.  If I then wait another 3-4 seconds and try again, it still says the SBS server couldn't resolve it, but give a non-authoritative response with the IP of the CNN.com.  So it seems that the holdup with websites loading up-front is that the browser is waiting on the IP to resolve.  Other than re-running CEICW again, does anyone have any suggestion as to why it's taking the server so long to resolve external addresses?  Thank you in advance for any advice or assistance.
0
Comment
Question by:kylerogers
  • 3
  • 2
5 Comments
 
LVL 5

Accepted Solution

by:
DTAHARLEV earned 500 total points
ID: 24346541
Well, the reverse lookup isn't what is slowing it down, it does this only when you put in the query; BUT, can you paste a printout of what it shows exactly? is it trying to use your DNS server? are they answering?

Perhaps they're just not answering, after which it's going out to the secondary; OR, your DNS servers only query the root servers, which causes replies to come back slow (i.e. there are no forwarders configured)
0
 

Author Comment

by:kylerogers
ID: 24346581
This is the output from one of the clients.  I waited around 5 seconds before making the second nslookup request.  The only DNS server that that the client has defined on its NIC is the SBS IP (192.168.1.2).


C:\Documents and Settings\user>nslookup www.experts-exchange.com
*** Can't find server name for address 192.168.1.2: Non-existent domain
*** Default servers are not available
Server:  UnKnown
Address:  192.168.1.2
 

DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out


C:\Documents and Settings\user>nslookup www.experts-exchange.com

*** Can't find server name for address 192.168.1.2: Non-existent domain
*** Default servers are not available
Server:  UnKnown
Address:  192.168.1.2
 

Non-authoritative answer:
Name:    experts-exchange.com
Address:  64.156.132.140
Aliases:  www.experts-exchange.com

0
 
LVL 5

Expert Comment

by:DTAHARLEV
ID: 24346594
send the printout of an ipconfig /all please

0
 

Author Comment

by:kylerogers
ID: 24346628
Actually, I just figure out the problem.  When I originally set up the server, I had to do it off-site at my house and them move it to their office.  So I brought up the server on my home's subnet.  I thought I caught all of the DNS stuff once I changed the server's IP, but I missed the DNS forwarders.  It was trying to forward request to its old IP address before forwarding it on to the public DNS server.  I simply removed the old IP address from the forwarder list and it fixed the problem.  
0
 
LVL 5

Expert Comment

by:DTAHARLEV
ID: 24346754
giddiup
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

The problem of the system drive in SBS 2003 getting full continues to be an issue, even though SBS 2008 and SBS 2011 are both in the market place.  There are several solutions to this, including adding additional drive space or using third party uti…
I will assume you are running a non-server version of some sort of Windows throughout this article. There are many flavors of Windows since Windows Server 2000 - 2008, XP Home & Pro, Vista Home & Pro, and Windows 7 Starter, Home, Pro, Ultimate, etc.…
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

864 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now