Problems using VPN through a BT router

From: martin.howlett@xxxxxxxxx
Date: 1 Mar 2007 04:58:25 -0800

Hi,

I have been trying to do a VPN to an SBS server but without much luck.

I use a 2 NIC set up and have a BT Voyager 220V router / modem going
to the external NIC on the server. I have opened the ports i think i
need to allow GRE and remote access and the remote access and OWA
works fine. However whenever i try the VPN it fails to connect.

I have opened ports:

TCP - 3389
TCP - 443
TCP - 4125
UDP - 1701
TCP - 1723
TCP - 500

as i have read here and there they are related to remote connecting /
VPN. However it still refuses. I know its something to do with the
ports as when i put the router into DMZ, it works perfectly! Would it
be acceptable to leave the router in the DMZ, as i have the firewall
on the server itself? Or need i need to open more ports or something?

Thanks in advance,

Martin

.

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