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Conditional DNS forwarding issues server 2003

Posted on 2014-08-20
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Last Modified: 2014-08-25
I am having an issue with conditional DNS forwarding on server 03.

We have two domain we are looking to create a trust between. One is Server 08r2 DCs on functional level 08r2. The other consists of Server 03 DCs running in 2000 native.

We created conditional forwarders on the DNS servers for both domains. The ones in the 2008r2 environment work great. They are not however working on the server 2003 DCs. I then noticed that Server 08r2 servers in the older domain can resolve names from the new domain just fine. So the issue seems to be with just server 03. And in this case, it is a crucial one as the DCs are the ones we need to resolve the FQDNs so we can create the trust. :)
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Question by:Schuyler Dorsey
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by:Schuyler Dorsey
ID: 40274542
I verified it's not a firewall issue. I can nslookup anything fine when I specific the other DC as the server to use.
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by:Schuyler Dorsey
ID: 40274553
Also... I am specifying the FQDN when trying to resolve.
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by:Matt Coughlin
ID: 40274589
Hello Schuyler,

Would raising the functional level of the older servers to match the newer servers help? Just a thought.
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Schuyler Dorsey earned 0 total points
ID: 40274593
I wanted to do that first.. trust me! This is a high-security environment with a lot of crucial A.D. integrated apps running in the older production network. Getting clearance to raise it would take an act of god. :)

I did figure out out though! One of the DNS servers was missing the configured forwarders. It was present on 2/3 DCs. Once I added it to the last DC, I started working.
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by:Matt Coughlin
ID: 40274649
Awesome work!

And I agree, with all of those legacy AD integrated apps floating out there... I wouldn't raise it!
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Author Closing Comment

by:Schuyler Dorsey
ID: 40282640
I was able to solve it.
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