US Patent 7984164 Server, and packet transferring method and program therefor

A server that relays packet data transmitted and received between a first terminal and a second terminal among plurality of terminals, includes a transfer table storing unit configured to store a transfer table in which a connection address pair, includes a first connection address and a second connection address, is registered, and a connection establishment message processing unit configured to transmit a SYN ACK message as a response message to a SYN message, upon receiving the SYN message, for establishing a TCP connection from each of the terminals. The first connection address is used to connect the server and the first terminal and the second connection address is used to connect the server and the second terminal.