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.com domain names suddenly don't resolve anymore on our DNS server

Posted on 2013-06-20
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Last Modified: 2014-07-07
Earlier today our 2 DNS servers stopped resolving any domain name with .com. I can access all other domain names, internal, but for external I can only access .org, .edu, .net, etc, but cannot access .com domains. I have never seen this before. Any ideas?
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Question by:nismor240sx
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Expert Comment

by:Zephyr ICT
ID: 39261765
Is it Windows 2008 R2 ?

There is a KB that might be interesting: http://support.microsoft.com/kb/2508835
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Expert Comment

by:djStraTTos
ID: 39261769
Do you host private DNS servers to resolve internet URLs? I believe that you use forwarders on your internal DNS server that handle all the non internal DNS resolutions?
I guess it's a problem at your ISP side. Have you contacted them already? What was their reply?
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Expert Comment

by:Jan Springer
ID: 39263186
I would recommend installing dig and:

dig domain.com +trace

from within the c:/dig directory
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by:djStraTTos
ID: 39265107
@_jesper_ great tool mate! Thanks for sharing!!!
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nismor240sx earned 0 total points
ID: 40173404
So after hours of messing with it, it turned out an employee added a DNS entry for ".com" all by itself. I eventually found it on the list of my DNS records and once I deleted it, everything worked.
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Author Closing Comment

by:nismor240sx
ID: 40179962
I contacted the ISP and they reported everything was fine on the reverse DNS, etc. Finally after hours of searching I was able to figure it out.
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