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establish 2-way trust between two physically separated AD domains

Posted on 2012-03-09
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Last Modified: 2012-08-13
Hello,

I need to establish a two-way trust between 2 physically separated AD domains - when I run through the "create new trust" wizard and supply either side with the other side's domain name, the wizard will error out and tell me it cannot find the supplied Windows Domain.

Additional details:
there is a site to site VPN in place that enables connectivity between the two sites and hosts on either side are pingable and accessible by IP - general high level infrastructure concerns are pretty solid and there is no firewalling of the traffic between the two sites.

One domain controller on one side can ping the other by name, the other one cannot by name, but can by IP

The AD on one side has a domain functional level of 2003 / forest 2008

The AD on the other side has a domain functional level of 2000 / forest is 2003

One AD has a ".us" ending to its' internal NETBios domain name, the other has a ".com" ending to its' internal NETBios domain name :-/


What is the best way to configure DNS in this situation? Obviously I would like to avoid an internal domain re-name on the one that ends in ".com"

Will the functional levels need to be raised to support the trust?



The goal here is very simply to be able to login to computers at one site with credentials from the other site.

Thank you!
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Question by:Bill Welsh
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Accepted Solution

by:
Mike Kline earned 500 total points
ID: 37703714
You can use conditional forwarders for name resolution    (stub zones and secondary zones would work too) http://technet.microsoft.com/en-us/library/ee307976(v=ws.10).aspx

So you set a conditional forwarder in domain A to point to domain B and vice versa.

Also make sure your ports are open

http://support.microsoft.com/kb/179442

Thankjs

Mike
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Author Closing Comment

by:Bill Welsh
ID: 37715879
The newly created conditional forwarders at both sites fixed this problem beautifully, much appreciated!
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