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vpn port configuration through firewall

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by info

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I have just setup the a windows 2000 machine to accept incoming VPN connections, but I need to know which ports need to be forward from the router

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by jim-h

If your VPN tunnels are PPTP and defaulted to standards as I am assuming here then you want to forward TCP 1723 packets to your VPN Server.

Microsoft references this here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwebtool/html/understanding_pptp.asp

You may also want to keep in mind that PPTP uses GRE (General Routing Encapsulation) that would be recognized by firewalls as a Port 47 Protocol ?rather? than TCP/UDP once established. See here for details:
http://www.iana.org/assignments/protocol-numbers

Good Luck! I hope it helps.
-Jim

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