You need first to subscribe to a VPN service in order to configure it on router. PureVPN and ExpressVPN are my favorites.Every information you can get from their support or simply contact them via...

If I understand you correctly, what you want is a reverse proxy (haproxy, squid, etc). Now, my question is. What are you trying to accomplish? If you're using apache, you can simply create virtual...

There is no need a dual wan. What you need is to open a port on router A (SSH) for example, so you can access it from anywhere, including your LAN B network. However, this is not recommended, as...