Create VPN Server with only one ethernet port

[Adr3nalin]

Hi all,

i have a W2K VPN server that has one port (internal), the reason this server do not have the secondary port for public interface, cause the firewall handle the NAT.
( it was not configured by me)

i try to setup another VPN server with one port , but has no luck, do you have any suggestion on how to do this ?

notes: i know it will works fine, if we have 2 ethernet ports, 1 for public and 1 for private)

thanks in advance for your help.