分布式拒绝服务击与防范 论文.doc

XXXXXXXX学院 专科毕业设计（论文） 题 目 拒绝服务攻击与防范 学生姓名 专业班级 学 号 系 别 计算机系 指导教师 职称 完成时间 分布式拒绝服务攻击与防范 摘 要 随着Internet的不断发展，人们对它的利用和依赖日益增加，而电子商务的不断普及和应用，对互联网的安全性提出了更高的要求。但由于各种网络系统包括有关软件、硬件的缺陷以及系统管理方面的漏洞，导致了许多安全隐患。互联网的攻击手段层出不穷，分布式拒绝服务（DDoS）攻击就是其中最具破坏力的一种。分布式拒绝服务（DDoS）攻击是从拒绝服务攻击（DoS）演变而来的。由于其分布式的特征，使得攻击比传统的DoS攻击拥有更多的攻击资源，具有更强的破坏力，而且更难以防范。加之结构简单、操作方便使它成为了攻击者最青睐的攻击手段。DDoS攻击已经对Internet安全构成了极大的威胁，成为最难解决的网络安全问题之一，也是目前网络安全界研究的热点。对于分布式拒绝服务攻击而言，目前还没有比较完善的解决方案。分布式拒绝服务攻击是与目前使用的网络协议密切相关的，它的彻底解决即使不是不可能的，至少是极为困难的。最近几年，人们针对DDoS攻击从不同角度提出了不少防范措施。DISTRIBUTED DENIAL OF SERVICE ATTACKS AND THE DEFENSE ABSTRACT ?With the development of Internet, it leads to affect and impulse to people’s living and working hugely. Because of the application and popularization of the Electronic Business Affairs, the security of Internet is becoming more and more important. But there are weakness of Internet systems, including softwares and hardwares’ bugs, as well as holes in management, which lead to a lot of hidden troubles. Distributed Denial of Service DDoS Attack is the most destructive attacking means, while there are many other ones. DDoS comes from Denial of Service DoS Attack. Due to its distributed characteristic, DDoS attacks posses more attack resources and have more destroying power. Furthermore, as a result of it’s simple structure and convenient operation, it become the most favorite attack means. DDoS attacks bring much great threats to Internet security, it constitute one of the hardest securety problems in today’s Internet and research on it has become a hotspot in network security fields. There are few schemes to solve DDoS problem perfectly until today. DDoS is relevant to protocols of today’s Internet closely, therefore the solution is hard to promote. In recent years, defense measures to DDoS are promoted from different angles. KEY WORDS Denial of Service ，Distributed Denial of Service ，Defense1 分布式拒绝服务的由来及原理 5 1.1 分布式拒绝服务的起源 5 1.2 分析分布式拒绝服务攻击的原理 5 2 DDOS的表现 8 2.1DOS以及DDoS的攻击方法