Patent ID: 8218558

Claim:
A data transfer system enabling access to multiple subnets, comprising: an electronic system comprising: a memory unit comprising a virtual private network (VPN) client for simulating a virtual interface and assigning a virtual internet protocol (IP) address to the virtual interface; a network unit providing a network transmission module; and a processing unit connected to the memory unit and the network unit; a VPN router connected to the network unit of the electronic system and providing the electronic system with the ability of logging in a VPN via the VPN router; and a plurality of remote electronic systems connected to the VPN router and distributed in at least one subnet of the VPN; wherein the electronic system is connected to the VPN router via the network unit, obtains the virtual IP address of the at least one subnet via the VPN router, and assigns the virtual IP address to the virtual interface, and the electronic system is connected to the plurality of remote electronic systems in the at least one subnet of the VPN.