论文题目：基于旁路的 Web 访问监控系统的设计与实现学生姓名：指导老师：摘 要在实验室或者办公室，管理员总是希望学生或员工可以专心自己的任务，而不去浏览观看与学习或工作无关的网页或网站。因而，当学生或员工输入无关网址时，管理员的服务器可以抢在其打开网页前与其进行“握手”并发送管理员提前准备好的页面，从而阻止了其正常访问，提高了学习工作效率。首先介绍了不良网站对于正常网络的入侵以及危害，通过把网卡设置为混杂模式实现了捕获数据包的操作，从而有效的对于整个网络进行监听，通过 IP 包过滤模块把HTTP 中除 GET 包和 POST 包过滤掉，提取出 URL 地址，然后与事先准备的数据库黑名单网址进行匹配，来推断出哪些是对工作或学习无关的网址，进而拦截其访问，达到了净化网络环境的目的。最后，针对该系统实施了详细的性能和功能的测试，使功能完整，且系统的性能有一定的优化。关 键 词：混杂模式 捕获数据包 网页Title: Base on the bypass web access montitoring system deisign and implementationName: Supervisor: AbstractIn the laboratory or office, administrators or employees can always expect students to concentrate on their own tasks, rather than to browse watch and study or work unrelated pages or sites. Thus, when students or staff independent of the input URL, the server administrator can grab it on the page in front of their "handshake" prepared in advance and send the administrator page, thus preventing its normal access, improve the learning efficiency.First introduced the bad sites for normal network intrusion and damage, the card is set by the operator to achieve a packet capture to promiscuous mode, so as to effectively monitor the entire network through IP packet filtering module in addition to the HTTP GET and POST package packet filter to extract the URL address, and then prepared a database with URL blacklist matching to determine which is unrelated to work or study site, thus blocking its access to the network environme...
