COMMUNICATION SYSTEM, INFORMATION PROCESSING APPARATUS, SERVER, AND COMMUNICATION METHOD

摘要

A first information processing apparatus (1) transmits, via a first communication control apparatus (3), to a second communication control apparatus (4) a bubble packet for leaving a transmission history in the first communication control apparatus (3). A second information processing apparatus (2) transmits a return packet to one or more ports, which include at least a bubble packet transmission port, of the first communication control apparatus (3). The first information processing apparatus (1) accepts the return packet transmitted from the second information processing apparatus (2) through the second communication control apparatus (4) to the bubble packet transmission port. According to this structure, a communication system is provide which ensures that communication is established between a plurality of information processing apparatuses via a communication control apparatus (NAT).