A method and system for cross-network data transmission

Abstract

The invention discloses a cross-network data transmission method and system. The method comprises: safety isolation gateways are arranged in a network unit, wherein the safety isolation gateways and management platforms in the network units which the safety isolation gateways belong to are connected and the safety isolation gateways a in different network units are connected by cables; data that include multimedia data and are transmitted in a cross-network mode are transmitted by the safety isolation gateways; and the transmitted multimedia data are transmitted between safety isolation gateways in an analog signal mode. According to the invention, because the multimedia data are transmitted between safety isolation gateways in an analog signal mode and thus connection and data communication between the safety isolation gateways are carried out by not using cables, TCP / IP isolation is realized and an attack of an IP data packet is blocked, so that mutual attacking and intruding between networks as well as mutual damages on networks can be avoided.

Description

technical field [0001] The invention relates to network security isolation and information transmission technology, in particular to a cross-network data transmission method and system. Background technique [0002] In the field of monitoring, most enterprises, institutions, and government departments have their own dedicated networks for monitoring, and these independent monitoring networks also need to be connected to the external Internet or a dedicated network of another organization to achieve interaction with another network access, information sharing and invoking, such as downloading Internet resources to devices on a dedicated network, or remotely using devices in a private network to monitor terminal devices on the Internet as needed, or using Internet monitoring in a private network Monitor the device, or use the client terminal in the private network to initiate a group call to the audio call device in the Internet as needed, etc. [0003] For security reasons, ...

AI Technical Summary

Problems solved by technology

[0006] 1. The firewall cannot resist the latest attack vulnerabilities without setting policies, so the firewall has nothing to do with new hacking methods and new viruses, and can only wait for an upgrade;

[0007] 2. The limit on the number of concurrent connections of the firewall can easily lead to congestion or overflow;

[0008] 3. Most of the attacks on the legally open ports cannot be blocked by the firewall;

[0009] 4. Firewalls generally cannot prevent attacks initiated by internal networks (such as LANs and private networks to be protected by firewalls) that initiate connections

However, GAP does not support interactive access, and it is costly and difficult to construct and configure

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