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Windows 2003/VPN

Posted on 2007-03-20
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Last Modified: 2007-11-20
Hi,

I have setup VPN on Windows 2003 Server. As I didn't have 2 NIC I configured Loopback Adapter and everything looks fine. I am able to connect to VPN Server and browse websites. But I am not able to setup multiple VPN clients to connect to the server. Only 1 user can connect at a time. This it what I need.

1. I want multiple users to connect to the server using VPN client.
2. I want to configure Routing and Remote Access in a way that 1 username should not be able to connect from multiple locations. e.g if user Test1 is already connected to the server through VPN client the server should not allow anyone else to connect through the same username i.e "Test1" from a diffrent location. But Test2, Test3, Test4, Test5 can connect at the same time.

Please let me know how to I go ahead and set this up?

Thank you for  your time and efforts!
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Question by:w2kservers
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Phadke_hemant earned 168 total points
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remove the loopback adapter and insert additional network card if required
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by:Rob Williams
Rob Williams earned 166 total points
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Windows server does not need 2 network adapters to configure RRAS/VPN. Using the loopback adapter can actually cause more problems. Following link has great detail on setting up using a single network adapter:
http://www.onecomputerguy.com/networking/w3k_vpn_server.htm
I would recommend un-installing the loopback adapter as suggested by Phadke_hemant, un-install RRAS by opening the RRAS console, right clicking on the server name and select disable, and then re-install and configure as per the instructions in the link. If you want multiple clients to connect make sure you have enabled more than one PPTP port (it will by default).

As for blocking multiple connections by the same user account, that is very difficult to do. Even on your local network they can do that, but there it can be restricted by group policy. You can install Internet Authentication Service, and add additional restrictions, but not that. Usually you simply have to "try" to restrict users from sharing their passwords.
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by:Bill_Fleury
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I have also seen situations where the router itself will only support a single PPTP connection at a time.  I believe enableing the PPTP Passthru setting on the router fixed the problem, however it was a dog's age ago that I had this problem.
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