I've got a business customer on a DSL connection thru a Zyxel Prestige 640R modem/router with port 1723 directing to a Windows 2000 server for VPN access. Been working great. But now the boss is wanting to add a Webramp 700s firewall into the mix to filter porn and other undesirable content. So now the connection goes from ISP > DSL ROUTER > FIREWALL > SWITCH > VPN SERVER. I've got internet access running just fine, but I can't get the port forwarding right so the VPN works. At the suggestion on our ISP, I forwarded the ports in the DSL router to the firewall, and then in the firewall I forwarded the ports to the server. The firewall log shows the packets coming through on port 1723 are being dropped.
Can anyone give me any suggestions on how to get the VPN working?