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arXiv 1103.3333cs.CR
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一种鲁棒的Web服务器分布式拒绝OF服务攻击防御机制

A Robust Mechanism for Defending Distributed Denial OF Service Attacks on Web Servers

Jaydip Sen

摘要:

分布式拒绝服务(DDoS)攻击已成为造成大规模有针对性的服务中断的流行手段,通常会持续很长一段时间。发起此类攻击的相对容易和低成本,加上目前任何可行的防御机制的不足,使其成为当今互联网社区的最大威胁之一。由于基于Web的应用程序的日益普及,导致在互联网上提供了几个关键的服务,它是必要的,以监测网络流量,以防止恶意攻击者耗尽网络的资源和拒绝服务的合法用户。本文首先简要讨论了目前存在的一些重要类型的DDoS攻击和一些现有的机制来对抗这些攻击。然后指出了目前现有防御机制的主要缺点,并提出了一种新的机制来保护Web服务器免受DDoS攻击。在所提出的机制中,持续监控服务器的入站流量,并立即检测入站流量中的任何异常上升。检测算法基于对服务器上的入站流量的统计分析和稳健的假设检验框架。对所提出的机制进行了仿真,结果表明,所提出的防御机制对DDoS攻击的有效性。

英文摘要:

Distributed Denial of Service (DDoS) attacks have emerged as a popular means of causing mass targeted service disruptions, often for extended periods of time. The relative ease and low costs of launching such attacks, supplemented by the current inadequate sate of any viable defense mechanism, have made them one of the top threats to the Internet community today. Since the increasing popularity of web-based applications has led to several critical services being provided over the Internet, it is imperative to monitor the network traffic so as to prevent malicious attackers from depleting the resources of the network and denying services to legitimate users. This paper first presents a brief discussion on some of the important types of DDoS attacks that currently exist and some existing mechanisms to combat these attacks. It then points out the major drawbacks of the currently existing defense mechanisms and proposes a new mechanism for protecting a web-server against a DDoS attack. In the proposed mechanism, incoming traffic to the server is continuously monitored and any abnormal rise in the inbound traffic is immediately detected. The detection algorithm is based on a statistical analysis of the inbound traffic on the server and a robust hypothesis testing framework. Simulations carried out on the proposed mechanism have produced results that demonstrate effectiveness of the proposed defense mechanism against DDoS attacks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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