防火墙技术的分析与研究.pdf

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题目：防火墙技术的分析与研究

防火墙技术的分析与研究

内容摘要

针对目前面临的网络安全问题，对网络安全和防火墙的基本概念进行了概括。

防火墙是一种访问控制技术，它通过在某个机构的网络和不安全的网络之间设置

障碍，阻止信息资源的非法访问。又系统地阐述了主机网络防火墙的工作原理和

关键技术。分析了防火墙技术在Internet安全上的重要作用，并提出其不足之处

和解决方案，阐述了防火墙发展趋势。本文通过对防火墙历史的发展和定义的描

述，着重讲防火墙技术上可分为四种基本类型（包过滤型、网络地址转换—NAT、

代理型和监测型），以及防火墙应用的重要性。

关键词：防火墙；防火墙技术；防火墙技术分析；防火墙技术应用

防火墙技术的分析与研究

内容摘要····························································································I·

引言·······························································································1

1概述·······························································································2

1.1背景·······················································································2

1.2本文的主要内容及组织结构·························································2

2防火墙技术的优缺点·········································································3

2.1防火墙技术··············································································3

2.1.1防火墙的定义···································································3

2.1.2防火墙的功能···································································3

2.2防火墙的优缺点········································································3

3防火墙的基本类型及发展···································································5

3.1防火墙类型··············································································5

3.1.1包过滤型·········································································5

3.1.2网络地址转化一NAT·································

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