A provider system connects through a virtual private network to a site having various possible virtual private network variants. A virtual private network connection is established to site data management server through a network interface. A virtual machine server, including virtual machines, communicates with the provider system. Each virtual machine is capable of building a virtual private network tunnel connection, over a network, to a site data management server. In establishing a connection, a connection script is executed, a virtual private network is determined, and a virtual private network protocol is executed.