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Active Directory through VPN tunnel Server 2003

Posted on 2007-10-06
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I have a VPN tunnel configured with two firewalls.  Domain A has its own Forest, Domain B has its own Forest.  I want to create a trust or make domain B a subdomain if possible of Domain A.  I can ping and access all server by typing the ip address, So I know my connection is good. Both servers are windows 2003 active directory master domain contollers with DNS on them.  I am having difficulty as to where to start in DNS to allow Domain B to see Domain A to create any sort of trust relationship.
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Question by:playton
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LauraEHunterMVP earned 2000 total points
ID: 20029097
> "I want to create a trust or make domain B a subdomain if possible of Domain A. "

The only way to make domainB a sub-domain of domainA is to perform a full-on Active Directory migration; there's no simple way to take an existing forest root domain and say "Okay, we're going to graft you onto this other forest over here now."

On to the trust relationship.  In order to create a trust, DomainA must be able to resolve the A records and SRV records for DomainB's domain controllers, and vice versa.  Two common ways to do this:

[1] Set up conditional forwarding on your DNS servers.  Configure DomainA DNS with conditional forwarders that forward all *.domainb.com queries to the IP addresses of DomainB's DNS servers, and vice versa.

[2] Set up a stub zone in DomainA that points to DomainB's DNS servers, and vice versa.

Also ensure that the correct ports are open between DomainA's DCs and DomainB's DCs: http://technet.microsoft.com/en-us/library/Bb727063.aspx
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