Hi Subash,
I'm a little unclear about the question. It seems that you would like to setup a VPN so that user can remote access the created domain.
If that is correct, here is a document which provided detailed steps to setup VPN:
Remote Access Step-by-Step Guide: Deploying Remote Access with VPN Reconnect
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=7E973087-3D2D-4CAC-ABDF-CC7BDE298847&displaylang=en
For further information please refer to Routing and Remote Access:
http://technet.microsoft.com/en-us/network/bb545655

Shaon Shan |TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tngfb@microsoft.com