| 主权项 |
1. A VPN connection system comprising:
a client device configured to generate a client authentication data in response to a VPN (Virtual Private Network) connection request; a relay server device configured to relay a communication through a protocol which is different from an electronic mail; and a VPN server device configured to establish an always-on connection with the relay server device through the protocol, wherein the client device is configured to establish a connection with the relay server through the protocol to transmit the client authentication data to the relay server, the relay server device is configured to use the always-on connection to relay the transmitted client authentication data to the VPN server device when a connection is established with the client device, and the VPN server device is configured to perform an authentication of the client device based on the client authentication data, and to report a failure of a VPN connection to the client device when the authentication is failed, and to implement a VPN connection with the client device when the authentication is succeeded, wherein the relay server device comprises: a first relay information accumulation processor configured to store status information indicating whether an authentication data relay function is turned on or turned off and connection authentication information specifying the relay server device; an authentication key transfer processor configured to request a VPN server device side connection authentication information to the VPN server device when the authentication data relay function is turned on and the device identification information is transmitted from the client device, and to establish an always-on connection with the relay server device and the VPN server device through the protocol when the connection authentication information stored in the first relay information accumulation processor and the VPN server device side connection authentication information is matched. |
