防火墙及入侵检测系统的研究
摘要：互联网络的蓬勃发展给人们的工作生活带来极大的便利，然而，随着现代化网络应用的普及，伴随而来的网络不安全因素也给网络信息安全带来了严峻挑战，传统的网络安全技术已经很难对付这些日益严重的安全威胁，所以我们就有必要去开发专门的工具去避免这些不安全因素的攻击，而防火墙与入侵检测技术便可以作为一种很重要的技术为我们所用。
防火墙是网络安全的关键技术,是隔离在本地网络与外界网络之间的一道防御系统，其核心思想是在不安全的网络环境中构造一个相对安全的子网环境,防火墙是实施网络安全控制得一种必要技术。本文讨论了防火墙的安全功能、体系结构、实现防火墙的主要技术手段及配置等。
入侵检测是网络安全领域中一个较新的课题，检测引擎作为入侵检测系统的核心模块，其检测速度快慢直接影响网络入侵检测系统的效率，模式匹配是入侵检测系统的重要检测方法，其性能对入侵检测系统至关重要。
关键词：网络安全；病毒；防火墙；入侵技术
Research of firewall and intrusion detectiosystem
Sunnary：The vigorous development of the Internet to people's working lives of great convenience, however, with the popularity of modern network applications, network insecurity attendant also to network and information security posed a serious challenge to traditional network security technology has been difficult to deal with these increasingly serious security threat, so we have a need to develop specialized tools to avoid these attacks insecurity, while firewalls and intrusion detection technology can be used as a very important technology for us to use.
A firewall is a key network security technologies, is isolation between the local network and external network of a defensive system, the core idea is in an insecure network environment to construct a relatively safe environment subnet firewall is controlled implementation of network security a necessary technology. This article discusses the firewall security features, architecture, implementation and configuration of the main technical means, such as a firewall.
Network intrusion detection is a relatively new area of security issues, the detection engine as the core module of the intrusion detection system that detects the speed of the speed of a direct impact on the efficiency of network intrusion detection system, pattern matching is an important method to detect the intrusion detection system, the performance of intrusion detection system is essential.
Key Words：network security / virus / firewall / intrusion technology
目 录
一、我国网络安全现状
1.1研究背景·············································1
1.2研究意义·············································2
1.3计算机网络面临的威胁·································3
二、防火墙的基本概念和使用技术
2.1防火墙简介···········································6
2.2防火墙使用的技术·····································6
2.3网络地址转换NAT技术·································8
三、网络拓扑图
3.1防火墙的分类·········································9
3.2防火墙技术的发展与研究······························11
四、入侵检测技术
4.1入侵检测技术的定义··································14
4.2入侵检测技术的功能与原理····························14
4.3入侵检测技术的分类··································16
4.4入侵检测技术的发展与研究····························17
五、防火墙及入侵检测技术的优缺点分析
5.1防火墙的优点········································19
5.2防火墙的缺点········································19
5.3入侵检测技术的优点··································21
5.4入侵检测技术的缺点··································21
六、防火墙及入侵检测技术发展预测·······················22
七、小结···············································25
经过几周的时间终于完成了我的毕业论文。虽然论文并不尽善尽美，但在我看来还是有很大成就感的。在这个过程中，学会了如何快速查找资料并筛选出对论文有用的内容。明白了自己的论文主体大纲时，要根据大纲的每个模块分别去查找资料。还要结合一些实际的情况才能更了解所学的一些知识。
通过毕业论文的撰写，我巩固了大学三年所学专业知识，使自身有了新的提升，也将使我在以后的工作中受益匪浅。对待任何事情应该具备认真的态度和心态对于出现的任何问题和偏差都不要轻视，再通过正确的途径去解决，在做事情的过程中要有耐心和毅力，不要一遇到困难就退缩，只要坚持下去就一定会解决问题的。
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