VPN Server Behind Router Problem

Hey guys , I have win2k3 Access server on my Company behind a router which
have a real IP address , I want to forward a packets for VPN only to that
server what ports do I need to forward other then those :
50 and 51 and 1723 and udp 500 and 47 is there any other port cos I can't
make authentication please help
bye bye

quoted from http://howtonetworking.com.

Which ports need to be opened for running VPN

A: PPTP VPN uses TCP Port 1723, IP Protocol 47 (GRE); L2TP: UDP Port 1701; IPSec: UDP Port 500, Pass IP protocol 50 and 51. Note: 47 is a protocol number and not TCP port. The protocol name is GRE. It'll make a big difference when configuring your firewall or router.



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Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
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"Microsoft" <(E-Mail Removed)> wrote in message news:%(E-Mail Removed)...
Hey guys , I have win2k3 Access server on my Company behind a router which
have a real IP address , I want to forward a packets for VPN only to that
server what ports do I need to forward other then those :
50 and 51 and 1723 and udp 500 and 47 is there any other port cos I can't
make authentication please help
bye bye

http://www.microsoft.com/technet/pro...9982eca10.mspx
VPN servers and firewall configuration

You don't just simply forward ports,...it requires a feature that many of
those devices call "VPN Passthrough" to account for the GRE Protocol (47).
47 is a Protocol, not a port. Check the devices documentation,...not all
are capable.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

"Microsoft" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> Hey guys , I have win2k3 Access server on my Company behind a router which
> have a real IP address , I want to forward a packets for VPN only to that
> server what ports do I need to forward other then those :
> 50 and 51 and 1723 and udp 500 and 47 is there any other port cos I can't
> make authentication please help
> bye bye
>
>