Design and Realization of TCP-Based NAT Traversal in P2P

IP address shortage over IPv4 is a big problem now, therefore the more massive deployment of NAT equipments is coming. One of the urgent problems for P2P is that how can each peer behind NAT find others and can establish direct connection to others. This paper discusses a TCP-based traversal model on the foundation of existing traversal methods having been analyzed, designs and presents the details for its realization.