毕业设计论文基于企业需求分析cisc防火墙网络安全设计.doc

摘 要 众所周知，随着计算机的飞速发展以及网络技术的普遍应用，信息时代已经来临，信息作为一种重要的资源正得到了人们的重视与应用。因特网是一个发展非常活跃的领域，可能会受到黑客的非法攻击，所以在任何情况下，对于各种事故，无意或有意的破坏，保护数据及其传送、处理都是非常必要的。随着人们的安全意识加强，防火墙一般都被公司企业采用来保障网络的安全，一般的攻击者在有防火墙的情况下，一般是很难入侵的。随着Internet在我国的迅速发展，cisco防火墙技术引起了各方面的广泛关注。 一方面在对国外信息安全和cisco防火墙技术的发展进行跟踪，另一方面也已经自行开展了一些研究工作。 目前使用较多的，是在路由器上采用分组过滤技术提供安全保证，对其它方面的技术尚缺乏深入了解[1]。 cisco防火墙技术还处在一个发展阶段，仍有许多问题有待解决。 因此，密切关注防火墙的最新发展，对推动Internet在我国的健康发展有着重要的意义。 关键词：包过滤,防御,安全策略,需求分析,cisco防火墙 ABSTRACT As we all known, with the development of computer science and the wide application of network technology，the corresponding era had arrived. As an important resource,Information has received people’s great attention. Internet is a field with alive developing and it might be attacked by Hacker. So at any situation, it is very important to protect the transmission and the processing of the data. With security awareness to strengthen the firewall are generally used by companies to protect the security of the network, the attacker generally the case in a firewall, is generally difficult to invasion.With the rapid development of Internet in China, cisco firewall technology attracted wide attention in all aspects. The one hand, information security and foreign cisco firewall technology to track the other hand, some studies have been carried out their own work. More current is to use packet filtering on the router to provide security for other aspects of the technology is still a lack of understanding. cisco firewall technology is still in a stage of development, there are still many issues to be resolved. Therefore, pay close attention to the latest developments in the firewall, to promote the healthy development of Internet in China has an important significance. KEY WORDS: packet filter, defend, security policy, needs analysis, cisco firewall 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc296087365 摘 要 PAGEREF _Toc296087365 \h I HYPERLINK \l _Toc296087366 ABSTRACT PAGEREF _Toc296087366 \h II HYPERLINK \l _T