Virtual private network communication system, routing device and method thereof

A routing device adapted for a virtual private network communication system, comprising:

• a network interface unit connected to a server via an Internet;
• and
• a processing unit coupled to the network interface unit and transmitting registration information to the server via the network interface unit, wherein the registration information comprises a recognition string,
• wherein the processing unit further transmits a positioning request to the server via the network interface unit;
• and
• the processing unit receives positioning information from the server via the network interface unit, and the processing unit directly connects to a remote routing device via the network interface unit according to the positioning information and transmits data after the connection is established.

A virtual private network communication method adapted for a routing device in a virtual private network communication system, the virtual private network communication method comprising:

• transmitting registration information to a server in the virtual private network communication system, wherein the registration information comprises a recognition string;
• transmitting a positioning request to the server;
• receiving positioning information from the server and directly connecting to a remote routing device according to the positioning information;
• and
• transmitting data after the connection is established.