介绍ICMP协议及其特性，分析了黑客利用ICMP协议而产生的攻击：ICMP洪流和重定向，并提供了相应的解决方法。

This paper introduced ICMP and its characteristics, analyzing the hacker make use of ICMP but output attack: ICMP flood and redirect, and provided the homologous the method of solution to them.

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针对常见的IP地址欺骗、IP源路由欺骗、ICM P重定向欺骗、IP劫持等网络攻击给予了分析并在过滤管理模块中给出了防御的方法。

Common network attacks such as IP spoofing, source route spoofing, ICMP redirect deception and IP Hijack are analyzed and protected by filter manage module.

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ARP欺骗及ICM P重定向攻击是以太网中常用的攻击手段，两者都可达到监听网络或对目标主机进行拒绝服务攻击的效果。

ARP spoofing and ICMP redirection attack are used frequently, both of them can sniff the Ethernet or attack the target by means of denial of service.

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