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Need Help with DNS entries f/ SBS 2003

Posted on 2009-07-09
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Last Modified: 2012-05-07
I am getting a bunch of warning in my DNS log files and for some reason the PCs on the LAN teh DNS is not refreshing??  PCs are losing thier internet connection and I have to refresh the DNS to fix it?   I am using a Sonicwall TX170 that provides DHCP address.
DNS-error.txt
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Question by:bigblue72
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Expert Comment

by:Alan Hardisty
ID: 24816230
Here is a previos question about the same problem and a link which was accepted as the result, so hopefully you will be able to read through and resolve the issue.
http://www.experts-exchange.com/Networking/Misc/Q_21863073.html
If you get stuck anywhere, please come back for more assistance.
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Author Comment

by:bigblue72
ID: 24816621
I looked at the root hints and it is pointing to itself. Since this is SBS 2003 and its the only DNS sever on this local network I presume the problem is the root hint is pointing to itself??   So if thats the case then and this is the only DNS server do I just remove the root hint all together??
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Expert Comment

by:Alan Hardisty
ID: 24816663
Can you post some screen dumps of the Interfaces, Root Hints, Advanced and the Forwarders tabs please.
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Author Comment

by:bigblue72
ID: 24816797
I have created the screen shots in word
interfaces.docx
Fowarders.doc
advanced.doc
Root-Hints.docx
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Alan Hardisty earned 500 total points
ID: 24816918
Okay - all looks good apart from the Root Hints tab - I am attaching my Windows 2003 Root Hints screen dump - I have not modified these settings.
Please mirror these settings and test again.
There is an m.root-servers.net missing with an unknown entry - please add this too.

Root-Hints.jpg
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Author Comment

by:bigblue72
ID: 24816997
SO I do need to remove the current entry in root hints correct?? If you dont mind please explain these entries?
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Assisted Solution

by:Alan Hardisty
Alan Hardisty earned 500 total points
ID: 24817055
Have a read through this:
http://www.computerperformance.co.uk/w2k3/services/DNS_root_hints.htm
Essentially they are places to go to look up DNS info outside your domain - so at present you are looking internally, then checking for your root hints, which directs you back to your own server - going round in circles basically.
Remove your existing root hint, add the ones I have shown - and then click on the Monitoring Tab and check both simple and recursive tests and click on Test Now.  If you get a PASS in both Simple and Recursive - you are good to go.
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Author Comment

by:bigblue72
ID: 24818468
Funny you should mention the Monitoring Tab...I did both test and it passed prior to making changes. I am working on the server now so Ill get you know soon.
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Author Comment

by:bigblue72
ID: 24818509
Can I copy and paste this list from the cache.dns???
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Assisted Solution

by:Alan Hardisty
Alan Hardisty earned 500 total points
ID: 24818574
This article is relating to Windows 2000 but is also relevant for Windows 2003 - it explains why the root hints are needed.
http://support.microsoft.com/kb/235689
To answer your question about cache.dns - Yes - as long as the root hints are similar to the screen shot I attached.
Remove your root hint and add a couple of root hints for tests and you should see the DNS errors in the event logs stop.
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Author Closing Comment

by:bigblue72
ID: 31601678
Thanks for your help.  Hopefully this will fix the PCs and the issue is refreshing DNS/ internet connectivity
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Expert Comment

by:Alan Hardisty
ID: 24818694
If you still have problems - come back and I'll assist further,
Glad it is looking good so far.
Thanks for the points.
Alan
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