Local network connecting system local network connecting method and mobile terminal

A mobile terminal comprising:

• an address table database;
• a transmission and reception processor;
• and
• a transmission and reception unit,
• wherein said address table database stores an address table describing a relation of a first local address corresponding to a first local server within a first local network and a second local address corresponding to a second local network, the first local network different from the second local network,
• said transmission and reception processor assigns said second local address to a destination address of a packet based on said address table, and
• said transmission and reception unit transmits said packet to said first local server via a gateway and specifies the second local address as the destination address of the packet to be transmitted to the first local server,
• said mobile terminal further comprising:
• a connecting section;
• and
• an address table generator,
• wherein said connecting section connects to a DHCP “Dynamic Host Configuration Protocol” server in said second local network through a virtual private network (VPN), and
• said address table generator acquires an unused address pool corresponding to the second local network from said DHCP server through said VPN, and generates an address table describing a relation of a second local address acquired from said unused address pool and said first local address.

A method of connecting a mobile terminal to a local network, comprising:

• transmitting a packet destined to a first server from a mobile terminal to a gateway, the packet sent to a second local address selected from an unused local address pool of a second local network;
• translating, by a gateway connected to a first local network, said second local address into a first local address;
• and
• transmitting the packet from said gateway to said first server using the first local address as the destination address of the packet;
• acquiring the number of in-use local address over said first local network from said gateway;
• and
• generating an address table describing a relation of said first local address and said second local address, wherein:
• the first local network different from the second local network,
• said first server is provided for the first local network, and is assigned the first local address within the first local network,
• a VPN (virtual private network) exists between a second server on said second network and the mobile terminal, and the unused address pool corresponds to an unused VPN address pool,
• the number of addresses in the unused address pool is at least said number, and
• said mobile terminal selects said second local address from the unused address pool.