Virtual private networks

A system and method of automatically configuring virtual private networks is provided. The virtual private networks disclosed, include multiple routers selectively connectable to the shared network, such that each of the routers is assigned at least one: shared network address, private network address and virtual private network identifier. Each router includes a controller configured to communicate a router configuration message over the shared network to other members of the same virtual private network. The router configuration message informs the other members of the virtual private network the address of the router and what devices are connected to the router.