基于Windows终端信息过滤的网络访问控制研究

摘要

To prevent desktop computer from accessing unhealthy information via the Intemet, methods for information filtering and network access control are researched, a network access control model based on client information filtering is presented. URLs and/or their keywords, IP addresses, and other protocol information are used to recognize unauthorized websites. Text keywords are used to identify unauthorized web pages. By employing the technology of windows network filter driver, a network access control utility is developed. The presented model is implemented in the utility to block harmful web pages and unhealthy websites.%为防范终端从网络中获取不良信息,分析了常见的网络访问控制和信息过滤方法,建立了基于终端信息过滤的网络访问控制模型.该模型通过综合分析URL地址/关键字、IP地址和协议等信息来识别不良网站,通过分析网页文本关键词识别不良网页.基于Windows网络过滤驱动技术,开发了一款Windows终端网络信息过滤和访问控制软件.该软件拦截Windows终端的网络访问数据流,应用建立的网络访问控制模型,实现了对不良网站和网页的访问控制.