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Establish one-way external outgoing trust using RODC in trusted domain jh

Posted on 2011-09-15
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Last Modified: 2012-05-12
We have a domain that we'll call 'resource' that needs to be accessed by users in a third party domain that we'll call 'source.'

Due to security issues, we cannot route to all of the domain controllers in source from resource. What we've done is setup a DMZ in source and placed a RODC in it. We've created a dns zone on the DNS servers in resource pointing to the RODC (so all the necessary _ldap and _kerberos SRV records and the necessary A records).

When we try and create the external outgoing trust, we receive a message saying: 'The name you specified is not a valid Windows domain. Is the specified name a Kerberos V5 realm?'.

I've been told that the source RODC has full access to the writeable DCs in its domain. I'm also told that we should be able to setup the trust using the RODC, although I am sceptical.
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Question by:tlcsupport
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Expert Comment

by:Neil Russell
ID: 36541911
On your Source domain you need to have a DNS forwarder set up pointing to any valid DNS server on Resource, the RODC? Have you done this?
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Author Comment

by:tlcsupport
ID: 36542108
Yes, the source domain has a conditional forward to the resource domain and we have confirmed that queries resolve correctly.
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Expert Comment

by:CiboZe
ID: 37507522
Hello tlcsupport,

I am curious if you have been able to set up this trust using the RODC.? I am considering a similar trust setup and can not find any documentation certifying a RODC can be use this way.

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tlcsupport earned 0 total points
ID: 37507574
We ended up setting up the trust with a writeable DC, then replaced it with a RODC later and fudged DNS at the trusting end to only see the RODC at the trusted end.
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Expert Comment

by:CiboZe
ID: 37509074
Thank you very much for the feed back.
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Author Closing Comment

by:tlcsupport
ID: 37545708
Appears to not be possible. Although it's possible to setup the trust with a writeable DC at the trusted end and then replace with a RODC later.
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