信息网络安全 ›› 2017, Vol. 17 ›› Issue (12): 22-28.doi: 10.3969/j.issn.1671-1122.2017.12.005

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SDN中DDoS检测及多层防御方法研究

徐洋1,2(), 陈燚2, 何锐2, 谢晓尧1   

  1. 1. 贵州师范大学贵州省信息与计算科学重点实验室,贵州贵阳 550001
    2.贵州师范大学贵阳市公安局信息安全联合研究中心,贵州贵阳 550001
  • 收稿日期:2017-09-01 出版日期:2017-12-20 发布日期:2020-05-12
  • 作者简介:

    作者简介:徐洋(1983—),男,山东,副教授,博士,主要研究方向为网络安全、信息系统安全;陈燚(1992—),男,山东,硕士研究生,主要研究方向为网络安全;何锐(1972—),女,贵州,本科,主要研究方向为网络安全;谢晓尧(1952—),男,贵州,教授,博士,主要研究方向为大数据、网络安全。

  • 基金资助:
    国家自然科学基金重点项目[61332019];贵州省基础研究重大项目[黔科合J字20142001];贵州省科技合作计划重点项目[黔科合LH字20157763];住房和城乡建设部科学技术计划项目[2016-K3-009];全国统计科学研究项目[2016LY81]

Research of DDoS Detection and Multi-layer Defense in SDN

Yang XU1,2(), Yi CHEN2, Rui HE2, Xiaoyao XIE1   

  1. 1.Key Laboratory of Information and Computing Science of Guizhou Province, Guizhou Normal University, Guiyang Guizhou 550001, China
    2.Guizhou Normal University and Guiyang Public Security Bureau Joint Research Centre for Information Security, Guiyang Guizhou 550001, China
  • Received:2017-09-01 Online:2017-12-20 Published:2020-05-12

摘要:

软件定义网络的出现使传统网络发生了颠覆性的变革。文章针对SDN网络架构提出一种DDoS检测及防御方法。首先,提出基于熵值算法的DDoS检测方法,通过对熵值和阈值的比较进行攻击判断。然后,设计了双层防御体系,分别是在转发层对流表进行处理;在控制层利用新的检测方法判断攻击,结合ACL管控和流量管理,使用OpenFlow协议实现策略。最后,利用OpenDayLight控制器、sFlow监控工具和Mininet仿真器构建出一个实验仿真平台。实验结果表明,文章提出的检测及防御方法提高了对DDoS攻击行为的检测率,降低了误报率,并能够快速做出防御响应。

关键词: 软件定义网络, 分布式拒绝服务, 流表, 熵值, 检测及防御

Abstract:

Software defined network(SDN), has led to disruptive changes in traditional networks. In this paper, we propose a method of DDoS(distributed denial of dervice)detection and defense in SDN. Firstly,a DDoS detection method based on entropy algorithm is proposed. The attack is judged by comparing the entropy with the threshold. Secondly, double defense system is designed.At the forwarding layer, the convection table is processed. At the control level, the new detection method is used to determine the attack. Combining ACL control and traffic management,implement policies using the OpenFlow protocol. Lastly, an experimental simulation platform is constructed using OpenDayLight controller, sFlow monitoring tool and Mininet simulator. The experimental results show that, the proposed detection and defense methods improve the detection rate of DDoS attacks, reduce the false positive rate, and can quickly make defensive response.

Key words: SDN, DDoS, flow table, entropy, detection and defense

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