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Help on VPN over NAT !!!!

By Deven ·
I have problems in using VPN over the NAT,

Here is the scenario:
I have DSL cable connection and the router is Aztech Turbo 900, I configured a Windows 2000 VPN server on one of my machine on LAN having two LAN cards.
I configured my router for NAT and forwarded TCP port 1723 to the VPN server's IP address.
Now if I try from any machine on the LAN to connect to that VPN just to test, it works and the client gets connected. But if I try from outside, it goes till verifying the "usernameand password" after that I get a "Error 721: The remote computer is not responding"

How can I resolve this? Can I use VPN over NAT?

Any help would b appreciated. If I am following any wrong process, a detailed link will be appreciated.

Thanks in advance

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Help on VPN over NAT !!!!

by ak6110 In reply to Help on VPN over NAT !!!!

If I am not wrong, you have to open port 45 also.

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Help on VPN over NAT !!!!

by Ann777 In reply to Help on VPN over NAT !!!!

You need to allow Generic Routing Encapulation packets (generally this is port 47) on your Win2000 box:


Table C here:

http://www.microsoft.com/technet/treeview/
default.asp?url=/technet/prodtechnol/windows2000serv/
reskit/tcpip/part4/tcpappc.asp

(as always please remove any embedded spaces from the above link when pasting it into your browser)

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Help on VPN over NAT !!!!

by jhayesit In reply to Help on VPN over NAT !!!!

it looks right, you might also want to try to login with this format

domain\username
password.

hope this helps

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