System for communication, at least two communication method between two or more computers on the private network, a method for performing communication between systems located in separate private networks, communication links between systems located in separate private networks how to establish an integrated circuit chip in order to establish a data exchange between systems located in separate private networks, computer readable having program instructions for establishing a data exchange between systems located in separate private networks a medium

摘要

A method for communication and data exchange between two or more systems located in separate, private networks with each network behind a firewall device includes establishing communication with a proxy server. A first system and a second system establish a TCP connection with the proxy server. A TCP probing packet is transmitted to expose the port and address mapping of each firewall device for the systems in the network, and the mapping is provided to the systems. The proxy server commands each system to transmit a SYN packet to the other system, and then to transmit a SYN+ACK packet. The proxy server is used to facilitate the systems establishing essentially direct communication, and enables continued TCP data packet exchange without continued involvement of the proxy server.