I currently have an L2TP VPN server setup on Ubuntu Linux and operational with forwarding however I have a website hosted on the same IP as the VPN e.g.

Eth0 (physical) = (external ip)
website hosted at (so in other words locally/on LAN can enter ip into web browser and website loads)

However from the vpn client unable to access this one website (every other site works when entering web addresses into web browser)

Any suggestions?