文章基本信息

标题：DDoS Attack and Defense Scheme in Wireless Ad hoc Networks
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作者：S.A.Arunmozhi ; Y.Venkataramani
期刊名称：International Journal of Network Security & Its Applications
印刷版ISSN：0975-2307
电子版ISSN：0974-9330
出版年度：2011
卷号：3
期号：3
DOI：10.5121/ijnsa.2011.3312182
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：The wireless ad hoc networks are highly vulnerable to distributed denial of service(DDoS) attacks because of its unique characteristics such as open network architecture, shared wireless medium and stringent resource constraints. These attacks throttle the tcp throughput heavily and reduce the quality of service(QoS) to end systems gradually rather than refusing the clients from the services completely. In this paper, we discussed the DDoS attacks and proposed a defense scheme to improve the performance of the ad hoc networks. Our proposed defense mechanism uses the medium access control (MAC) layer information to detect the attackers. The status values from MAC layer that can be used for detection are Frequency of receiving RTS/CTS packets, Frequency of sensing a busy channel and the number of RTS/DATA retransmissions. Once the attackers are identified, all the packets from those nodes will be blocked. The network resources are made available to the legitimate users. We perform the simulation with Network Simulator NS2 and we proved that our proposed system improves the network performance.
关键词：distributed denial-of-service (DDoS); wireless ad hoc networks; medium access ;control; bandwidth reservation; distributed rate control