The vpn is on my synology.Hi @Todd Schmidt, glad you have your VPN server up and running. To answer your follow-up questions, it is important for us to know WHERE you actually installed it on? On that synology? On the BI pc? Asus router? Because depending on your answer, our advice will differ.
In any case: when connecting to your VPN server, you "enter" your network through a VPN-port-server forward (default 1194 by heart), and your VPN server gives an "internal" 10.x address. Make sure it does not "collide" with what you call the pc lan 10.0.0.x network. Your VPN server is then "internally" routing that 10.x address to your LAN address (hence it should differ from the aforementioned pc lan network, otherwise routing is not working). From there, you can access your "internal LAN".
So for BI do I just disable the wan access under the web server tab? And leave the lan IP address?