Method and device for preventing propagation of malicious file

Abstract

An embodiment of the invention discloses a method and a device for preventing propagation of a malicious file. According to the method, after a proxy server receives request information which is transmitted from a terminal for uploading an objective file to the server or downloading the objective file from the server is received, the proxy server acquires the objective file. The objective file is checked, thereby determining safety of the objective file. Only when the objective file does not carry a malicious virus, the objective file is transmitted to the server or transmitted to the terminal according to the request information. When the objective file is the malicious file, the objective file is moved to a virus isolating area. The objective file cannot be operated in the virus isolating area and cannot be uploaded to the server or transmitted to the terminal, thereby preventing propagation of the malicious file, eliminating a safety hazard of the malicious file to the server and the terminal, and furthermore preventing attack of the malicious file to the proxy server.

Description

technical field [0001] The invention relates to the technical field of network security, in particular to a method and a device for preventing the spread of malicious files. Background technique [0002] A network proxy refers to allowing a network terminal (generally a client) to make an indirect connection with another network terminal (generally a server) through this service. Some network devices such as gateways and routers have network proxy functions. In the network proxy, the client first establishes a connection with the proxy server, and then, according to the proxy protocol used by the proxy server, requests to establish a connection to the server or obtain specified resources (such as files) of the server. [0003] However, when a user uploads a file to the cloud server, if the uploaded file is a malicious file, the malicious file uploaded to the cloud server will not only affect the performance of the cloud server, but also cause the spread of the malicious fil...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to solve the problem of how to solve the problem of the transmission of files between the existing user terminal and the server, because the transmitted file is a malicious file, thereby causing the spread of malicious files, which is a safety belt for the user terminal and the server. threatening questions

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