What is the detailed procedure to establish a PPTE VPN connection between a Client using Windows 8.1, the client connected to a generic router, the generic router connected to an RVS4000 router via the internet and finally the RVS4000 router connected to a Server using Windows Server Essential 2012R2? The intention is to have the Client Computer operate remotely and connect to data files on the server . The server is a Dell T320 with two NIC ports.