1、 计算机系计算机系毕业论文毕业论文 题 目: 局域网 ARP 攻击及防范 专 业: 计算机网络技术 年 级: 高计算机 10 班 学生姓名: 学 号: 指导教师: 2012 年 12 月 12 日 I 局域网 ARP 攻击及防范 摘要:摘要: ARP 攻击,是针对以太网地址解析协议(ARP)的一种攻击技术。此种攻击可让攻 击者取得局域网上的数据封包甚至可篡改封包, 且可让网络上特定计算机或所有计算机无法 正常连接。目前,ARP 欺骗是黑客常用的攻击手段之一,且 ARP 欺骗攻击的后果一般都是比 较非常严重的,大多数情况下会造成大面积掉线。有些网管员对此不甚了解,出现故障时, 认为 PC 没有问
2、题, 交换机没掉线的“本事”, 电信也不承认宽带故障。 而且如果第一种 ARP 欺骗发生时,只要重启路由器,网络就能全面恢复,那问题一定是在路由器了。为此,宽带 路由器被认为是“罪魁祸首” ,而事实并非如此。鉴于此,本文将论述 ARP 地址解析协议的 含义和工作原理, 分析了 ARP 协议所存在的安全漏洞, 分析网段内和跨网段 ARP 欺骗的实现 过程。最后,结合网络管理的实际工作,介绍 IP 地址和 MAC 地址绑定、交换机端口和 MAC 地址绑定、VLAN 隔离等技术等几种能够有效防御 ARP 欺骗攻击的安全防范策略。最后通过 使用文中介绍安全防范策略成功阻止 P2P 终结者、 Arpki
3、ller 等 ARP 攻击软件的攻击验证了 该安全策略的有效性。 关键词:关键词: ARP 协议 IP 地址 局域网 MAC 地址 网络安全 LAN ARP attack and protection AbstractAbstract: : ARP attack, which is based on Ethernet addresses analytical protocol (ARP) an attack technology. This attack may let the attacker has a local-area network packets of data or even
4、tamper with the packet, and allows network on specific computer or all computer cannot normal connection. At present, the ARP deception is hackers commonly used attack means one, and the consequences of ARP deception attack is usually compare very serious, in most circumstances will caused extensive
5、 calls. Some network administrator are not well understood, malfunction, think PC no problem, switches didnt dropped “skill“, telecom does not acknowledge broadband fault. And if the first kind of ARP deception occurs, as long as the restart router, the network can fully recover, that problem must b
6、e on a router. Therefore, broadband router is considered “the chief culprit“, but this is not the case. In view of this, this article will be discussed the meaning of ARP address analytical protocol and working principle, analyzes the existing ARP agreement security vulnerabilities, analyzing network segment within and across the network segment the realization process of ARP deception. Finally, combined with the practical work of network management, introduces the IP address and MA