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分类号:TP393 U D C:D10621-408-(2007) 5802-0
密级:公开编号:2002212081
成都信息工程学院
学位论文
局域网中的网络监听系统的设计与实现
论文作者姓名:
杜高鹏
申请学位专业:
计算机科学与技术
申请学位类别:
工学学士
指导教师姓名(职称):
罗代升(教授)
论文提交日期:
2007年06月10日
局域网中的网络监听系统的设计与实现
摘要
随着计算机网络技术的迅速发展,网络的安全问题也显得越发重要。网络监听技术是系统安全领域内一个非常敏感的话题,也是一项重要的技术,具有很强的现实应用背景。网络监听是网络监测、负载分析等管理活动常用的方法,同时也是黑客非法窃取信息的手段。网络监听工具通过网络传输介质的共享特性实现抓包,获得当前网络的使用状况,为网络管理员对网络中的信息进行实时的监测、分析提供一个合适的工具;同时也让黑客截获本网段的一些敏感信息,威胁网络安全。
数据包捕获技术是设计网络分析软件的基础,而WinPcap则是Windows系统中实现的一个优秀的包捕获架构。文中结合该软件包的结构与功能对包捕获原理进行了详细的分析,并介绍了其在网络安全监控系统中的应用。该系统的基本原理是通过调用WinPcap库捕获本地网络上的所有数据包,然后对数据包进行协议分析,从而可以实时地监控网络。
关键词:网络监听;WinPcap;包捕获;协议分析
Design and Implementation work Sniffing
System in LAN
Abstract
With the rapid development and extensive application work technology, the security problem work es more important. Network sniffer is an important issue and technique in the domain of system security, so it has strong realism application background. Network sniffer is a way which is used work monitor, load analysis; at the same time it is also a way which is used by hacker to get the information illegally. Network sniffer tools snap packets to get work’s current status by the shared characteristic of work transmission medium. It provides a useful tool work manager which can help them inspect and analyze the information work; simultaneously hackers also get some important information, so threaten system security.
Packet capturing technology is the basis for designing analyzing software. WinPcap is one of the excellent packet capturing architectures under Windows. This paper analyzes packet capturing principle in bined with the structure and functions of the software and introduces its application in designing work security and watch system. The fundamental principle of this system is to capture all packets of the work using WinPcap library, and perform protocol analyzing and decoding on these packets, so can monitor work on real-time and find its problem and alarm