I got a Windows Server 2003 SBS that is acting as a VPN server. It is behind a D-Link EBR-2310 router that is acting as a firewall.
PPTP passthrough is enabled and port 1723 is fowarded to my VPN server IP adress.
However, it is impossible to establish a VPN connection even if my router setup looks fine. The only way I can make the connection work is by putting my server in the DMZ zone in my router config, which is unacceptable.
Is this a limitation of this router that can't accept incoming VPN connections? If so, what model of router would work for me? Thank you.