Method, system and network device for filtration

Abstract

The invention provides a method, a system and a network device for filtration. The method comprises the following steps: intercepting a request message transmitted by a user terminal to an internet server and extracting uniform resource locator (URL) information from the request message; determining a security level corresponding to the URL information according to the URL information; and processing the request message according to the security level. The invention solves the problems that internal memory space and CPU resources are occupied by anti-virus software installed on the user terminal, avoids the risks that malicious software can easily bypass the anti-virus software, effectively stops the propagation and the attack of the malicious software, reduces the threat of the malicious software to the user terminal and improves the network security and the user experience.

Description

technical field [0001] The invention relates to network security technology in the communication field, and specifically refers to a filtering method, system and network equipment. Background technique [0002] With the rapid development of communication technology, the operating systems applied to user terminals such as smartphones, Internet Protocol IP (Internet Protocol) telephones, and personal computers are increasingly standardized, and the corresponding operating systems are also open and universal. characteristics such as sex. At the same time, many user terminals also provide functions such as Bluetooth, infrared, multimedia messaging, GPRS (General Packet Radio Service) Internet access, Internet surfing, and wireless Internet access. [0003] Based on the above-mentioned status quo, the corresponding user terminal also provides an open operation interface for malicious software such as viruses and Trojan horses, and makes the user terminal more and more vulnerable...

AI Technical Summary

Problems solved by technology

[0006] (1) For user terminals such as smartphones, IP phones, and personal computers, due to the limitation of hardware processing capabilities, the installation of anti-virus software will consume a large amount of memory space and CPU resources, such as Kaspersky anti-virus installed on personal computers Take software as an example, it needs to take up a lot of memory space during installation, and sometimes the CPU usage rate reaches more than 80%, which seriously affects the normal work of the CPU

[0007] (2) There is also the risk of being easily bypassed by malicious software in this way. At present, many malicious program Trojans can identify the anti-virus software installed on the user terminal, and can close its anti-virus software or bypass its anti-virus software The detection of the virus makes the user terminal unable to recognize the virus, thus unable to effectively prevent the spread or attack of the virus

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