A communication method and communication system

Abstract

The invention discloses a communication method and system. The proxy client generates a UDP data transmission packet according to the identity information of the access client and the TCP data packet sent by it; the UDP server sends the UDP data transmission packet to the TCP server, and determines the UDP response according to the response data returned by it and the identity information of the access client Data packet; 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 access client respectively, communicates with the UDP server through the proxy client, and completes the information interaction between the public network and the various access clients inside the LAN, so that there is no The LAN server of the public network has the service capability of the public network, and supports the ability of one LAN server to provide servers for 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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