A communication method and a communication system

Abstract

The invention discloses a communication method and a system. The proxy client generates a UDP data transmission packet according to the identity information of the accessing client and the TCP data packet sent by the accessing client; The UDP server sends the UDP data transmission packet to the TCP server, and determines the UDP response packet according to the response data returned by the UDP server and the identity information of the accessing client. The proxy client obtains the identity of the access client and the response data sent by the TCP server, and sends the response data to the corresponding access client. The invention binds the TCP data and the response data of the TCP server with the identity information of the accessing client respectively, through the communication between the proxy client and the UDP server, the information exchange between the public network and each access client within the LAN can be completed, so that the LAN server without the public network can have the service ability of the public network and can support the ability of one LAN server to provide servers to multiple access clients.

Description

technical field [0001] The invention relates to the field of information transmission, in particular to a communication method and a communication system. Background technique [0002] With the popularization of network mobile office, in many cases, users need to access the enterprise LAN through the Internet; or real-time data communication is required between multiple regions of the enterprise. However, due to the scarcity of public network IPv4 resources, many companies do not have public network IP, and the devices in the external network use public network addresses, each address is globally unique, and the LAN devices use LAN addresses, which are only used in the LAN Effectively, there are multiple LAN devices around the world using the same LAN address. Therefore, the devices in the external network cannot directly communicate with the devices in the local area network. As a result, enterprise users cannot directly use the company's file resources in the external env...

AI Technical Summary

Problems solved by technology

Therefore, the devices in the external network cannot directly communicate with the devices in the local area network. As a result, enterprise users cannot directly use the company's file resources in the external environment, and cannot quickly and conveniently share resources in multiple organizations. Since there is no public network IP, building VPN is also very difficult. You can only choose some third-party remote interface tools to complete data transmission, which is extremely inconvenient to use

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