A network data transmission control method and system

Abstract

The invention discloses a network data transmission control method and system, by opening two socket server terminals on the service network terminal on one side of the firewall, and opening two socket client terminals on the client network terminal on the other side, and then Use the method allowed by the firewall to establish a TCP connection. When it is necessary to reversely access the target device on the client network side, after the service network device establishes a connection with the second server, the first server, the pre-established TCP link, and the first client notify the second client to establish a connection. After the connection with the target device is successfully established, the service network end-side device is notified that the connection is successfully established, allowing data to be transmitted, and access can be performed. The application is convenient and time-saving, and the timeliness of the data will not be reduced. These devices that need to establish a reverse connection are no different from direct access in a network without firewall restrictions, and by using the underlying TCP protocol to establish a data link, the interception of the firewall can be avoided.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a network data transmission control method and system. Background technique [0002] In two or more independent or relatively independent networks, in order to ensure the security of a single network environment and other reasons, the devices in an internal network (client network side) can only actively access the external network (service network side) The device cannot allow the external network (service network side) device to access the device in the internal network (client network side). When the access rules of these networks cannot be modified due to various reasons, this reverse communication can be achieved in the following ways: [0003] 1. Redesign and implement the network access mode between these devices. Devices on the external network (service network side) no longer access the internal network (client network side), but store information in the external ...

AI Technical Summary

Problems solved by technology

[0005] However, it takes a lot of time to redesign and implement the network access method between devices, and it will change the communication between these devices from real-time communication to non-real-time asynchronous communication, resulting in a decrease in the timeliness of data

When relying on SSH to achieve reverse communication, in some cases the firewalls of the internal network and external network will disable the SSH protocol, so this method cannot be used

[0006] Therefore, how to enable devices between different networks that can only establish a one-way connection for communication to achieve reverse active access, which is convenient to use and saves time, and does not reduce the timeliness of data, is a technical problem that those skilled in the art need to solve at present

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