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A method and device for defending against attacks

A technology of attack zone and protection equipment, applied in the field of communication, which can solve the problems of network paralysis, inability to attack packet defense, and delay in attack packet defense.

Active Publication Date: 2021-03-19
NEW H3C SECURITY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the defense method of the above-mentioned SYN FLOOD attack, before the defense attack is carried out, a large number of attack packets have arrived at the server or the network protection device, and there is actually a relatively large delay in the defense of the attack packets, and the attack packets cannot be responded to in a timely manner. Defensive, easy to cause network paralysis

Method used

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  • A method and device for defending against attacks
  • A method and device for defending against attacks
  • A method and device for defending against attacks

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] In order to realize timely defense against attack messages, embodiments of the present invention provide a method and device for defending against attacks, a network protection device, and a machine-readable storage medium.

[0023] A method for defending against attacks provided by an embodiment of the present invention is firstly introduced below.

[0024] The execution subject of the attack defense method provided in the embodiment of the present inv...

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Abstract

The embodiment of the present invention provides a method and device for defending an attack, wherein the method for defending an attack is applied to a network protection device and comprises the following steps: sending a reverse connection request to a to-be-detected user terminal according to a preset detection period; if the response message of the to-be-detected user terminal is not receivedwithin a first preset time, the suspected coefficient of the to-be-detected user terminal is increased; when the suspected coefficient is greater than a first preset threshold, the message sent by the to-be-detected user terminal is defended. According to the scheme, timely defense against message attacks can be realized.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method and device for defending against attacks. Background technique [0002] When establishing a TCP (Transmission Control Protocol, Transmission Control Protocol) connection, a three-way handshake operation needs to be completed between the user terminal and the server. Each handshake operation will use a corresponding handshake signal message, wherein the first handshake signal message sent by the user terminal to the server is a SYN (Synchronous, synchronization) message, which is used to request to establish a connection with the server. Synchronous packet flooding SYN FLOOD attacks often exist in TCP connections. SYN FLOOD attacks are one of the methods of DoS (Denial of Service, denial of service) attacks and DDoS (Distributed Denial of Service, distributed denial of service) attacks. An attack method that exploits the flaws of the TCP protocol to send a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L63/1466
Inventor 王春磊
Owner NEW H3C SECURITY TECH CO LTD
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