Windows SBS 2008 DNS issue

Posted on 2009-04-29
Medium Priority
Last Modified: 2012-05-06
Hi Experts,

Have a very annoying problem which I can't find enough information on anywhere.  We are running SBS 2008 and keep getting intermitant DNS issues.  For weeks now when browsing the internet certain pages just can't be found, the issue then gets worse until no web pages are found.  We then restart the server and everything runs as it should, for a day or two anyway.
Here are some of the errors found in the event log for DNS, although these don't always show up when DNS stops, so a little strange?

The DNS server could not bind a Transmission Control Protocol (TCP) socket to address  The event data is the error code.  An IP address of can indicate a valid "any address" configuration in which all configured IP addresses on the computer are available for use.
Restart the DNS server or reboot the computer.

The DNS server could not open socket for address
Verify that this is a valid IP address for the server computer.  If it is NOT valid use the Interfaces dialog under Server Properties in the DNS Manager to remove it from the list of IP interfaces.  Then stop and restart the DNS server. (If this was the only IP interface on this machine and the DNS server may not have started as a result of this error.  In that case remove the DNS\Parameters\ ListenAddress value in the services section of the registry and restart.)

The DNS server could not bind a User Datagram Protocol (UDP) socket to The event data is the error code. Restart the DNS server or reboot your computer.

After doing some research into this I see that this may have something to do with the port that DNS is using.  I have run a program called tcpview which I found on tech net and this seems to tell me that dns is runing on 2100..... which seems much higher than the usual 53?! I have also run netstat and saved the results in a file called info.txt (attached).  

I have also read this maybe a problem with a windows update, but after looking through updates that are installed I can not see any related, but there are quite a few.

So really just want to find out why our DNS seems to stop working every day or so and find out how to fix it.  I am not even sure if the errors from the event log have anything to do with this? but seemed to be a good place to start.

Any help much appriecated.
Question by:corecc
LVL 40

Expert Comment

by:Philip Elder
ID: 24261949
There is a problem with the underlying DNS server service and the root-hints setup as I understand it.

Use OpenDNS or your ISP's DNS servers in your DNS Forwarders setup and the problems will go away.

LVL 40

Accepted Solution

Philip Elder earned 2000 total points
ID: 24261952
BTW, Update Rollup 2 for SBS 2008 is supposed to address this problem.

LVL 59

Expert Comment

by:Darius Ghassem
ID: 24262122
MPECIns is right use DNS Forwarding to fix this issue. This is a know problem.
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Author Comment

ID: 24278833
Ok guys thank you for all the comments.... I will go and find out if this fixes the problem and get back to you as soon as possible.

Author Comment

ID: 24386181
Ok thanks for all your help...... It certainly looks as though this problem was caused by not having update roleup 2 for sbs 2008.  Strange thing is the update manager did not pick up that this update was not installed.  I had to look through installed updates "update history" to see that it wasn't.

Thanks again for all your help.

Expert Comment

ID: 26323425

I have the same problem - but how do you put in these DNS forwarders...please guide me. Thx!

Expert Comment

ID: 26523399
To add DNS forwarder's:

Start > Administrative Tools > DNS

Right hand click your DNS server (not the zones), Click "Properties" then the "Forwarders" tab.

Expert Comment

ID: 34994197
I was having the same issue. The two DNS servers listed were not resolving. So I deleted them and added 4 new ones that my ISP gave me and all 4 resolve perfectly and I have no more internet browsing issues!!!

Thanks All!!!



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