A dos/ddos attack detection method

Abstract

The invention discloses a method for detecting a DOS / DDOS (denial of service / distributed denial of service) attack. The method comprises the following steps of: firstly extracting needed flow characteristic parameters from network stream data, determining abnormal time points and constructing a historical time window by analyzing the flow characteristic parameters, and then finding out first N destination IPs (internet protocols) with maximum flows for the abnormal time points, determining an abnormal destination IP by analyzing sub streams including all the selected destination IPs in the horizontal time window, and finally, confirming the attack and recognizing an abnormal stream. The method is different from a conventional packet-by-packet analyzing method, adapts to the characteristic of the huge flow of a backbone network, can meet the requirement on real-time performance in the abnormality detection of the Backbone Network, can detect the DoS / DDoS attack more precisely in the backbone network, and can recognize an attack stream in the backbone network, so that a network manager can set a router in time, filters the flow sent by an attacker, and prevents the flow from harming a destination host.

Description

technical field [0001] The invention belongs to the field of network technology, in particular to a DOS / DDOS attack detection method. Background technique [0002] Denial of Service (DoS) attack is a form of attack that prevents a computer or network from providing normal services by sending a large number of data packets. It may exhaust all available network resources or system resources of the attacked object in a short period of time, making legitimate user requests unable to pass through or be processed, thus hindering normal communication in the network and bringing huge damage to the attacked and even the network. harm. [0003] A distributed denial of service (Distributed Denial of Service, DDoS) attack is a covert denial of service attack, and the data packets in the attack come from different attack sources. Compared with DoS attacks, DDoS attacks have smaller traffic on a single link and are difficult to be detected by network devices, so they are easier to form....

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to propose a DOS / DDOS attack detection method in order to solve the problems existing in the existing DoS / DDOS attack detection method

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