Impact Evaluation of DDoS Attacks on DNS Cache Server Using Queuing Model

Impact Evaluation of DDoS Attacks on DNS Cache Server Using Queuing Model
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基于排队模型的DDoS攻击对DNS缓存服务器的影响评估

DOI:
10.3837/tiis.2013.04.017
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发表时间:
2013-04
影响因子:
1.5
通讯作者:
Tseng, Shian-Shyong
Tseng, Shian-Shyong
中科院分区:
计算机科学4区
文献类型:
--
作者:
Wang, Zheng;Tseng, Shian-Shyong

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针对域名系统(DNS)的名称服务器的分布式拒绝服务(DDoS)攻击威胁到中断这一关键服务。本文研究了该高速缓存服务器对泛洪DNS查询流量的脆弱性。作为缓存服务器提供的解析服务,传入的DNS请求,甚至是大量的攻击流量,都被保持在等待队列中。请求的驻留持续到从权威服务器返回相应的响应或超时。受害者缓存服务器因此被冲击的业务过载,并且此后停机。通过缓存服务器和权威服务器的排队过程模型分析了这种攻击的影响。对于这种实际的双排队过程,存在一些特定的限制,如在缓存服务器队列中的有限逗留时间和两个排队过程的独立性。分析结果评估DDoS攻击对缓存服务器的影响。最后给出了数值结果,以供进一步分析。
Distributed Denial-of-Service (DDoS) attacks towards name servers of the Domain Name System (DNS) have threaten to disrupt this critical service. This paper studies the vulnerability of the cache server to the flooding DNS query traffic. As the resolution service provided by cache server, the incoming DNS requests, even the massive attacking traffic, are maintained in the waiting queue. The sojourn of requests lasts until the corresponding responses are returned from the authoritative server or time out. The victim cache server is thus overloaded by the pounding traffic and thereafter goes down. The impact of such attacks is analyzed via the model of queuing process in both cache server and authoritative server. Some specific limits hold for this practical dual queuing process, such as the limited sojourn time in the queue of cache server and the independence of the two queuing processes. The analytical results are presented to evaluate the impact of DDoS attacks on cache server. Finally, numerical results are provided for further analysis.
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