Can Computers in a remote office join the home office  domain through a Site-To-Site IPes vPN tunnel?

Posted on 2011-09-26
Last Modified: 2012-05-12
I just configure S2S VPNs from three remote offices to the Home Office using Cisco ASA 5505's. I have tested the VPNs and I can access files on the home network by using the UNC path from a PC in the remote office. The computers and servers are all Microsoft.

My question is, can the computers in the remote offices be joined directly to the home office network and if so how do I accomplish this?
Question by:MJcouture
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Accepted Solution

jmeggers earned 500 total points
ID: 36601107
To join a Windows XP computer to a domain, I believe you go to System Properties / Computer Name and start there.  There should be a button to join a workgroup or a domain.  But I'm not a Windows person, so it may be different in Windows 7, etc.

But in answer to your question, yes, computers should be able to join a domain over an IPSec tunnel.  The tunnel encrypts all traffic between two subnets.  Presumably one subnet is the remote office and the other is the main office where the controller is located.  As long as you're encrypting traffic between those two subnets, it should work.

Author Comment

ID: 36601144
I tried to Join the windows domain in the system properties but it does not work. I am sure I am missing something I am just no sure what. When I try, it tells me that the an active directory domain controller for the domain listed can not be contacted.

A dns issue?
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Expert Comment

ID: 36601223

I'd focus on DNS , from a remote office . Can you ping active directory DNS name ? e.g Company.local ?
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Author Closing Comment

ID: 36601224
Figured it out!
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Expert Comment

ID: 36601234
Make sure your remote PCs can ping your domain name . if that is successful , my next question is about your access lists . do you allow all protocols across your VPN tunnels ?

Author Comment

ID: 36601255
It looks like my whole post did not go through. It was a DNS issue.

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