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摘要 随着互联网的发展，当网络涉及不同的信任级别时，要保证安全必须安装安全控制设备，此类控制设备几乎总是某种形式的防火墙。随着网络安全问题日益严重，广大用户对网络安全产品也越来越关注。防火墙作为最早出现和使用量最大的安全产品，也受到用户和研发机构的青睐。在P机上使用的个人防火墙，很大程度上成为广大个人用户的安全保护者。 本文先介绍了个人防火墙开发的研究现状、VC++6.0和MFC程序的一些技术特点，然后对基于包过滤个人防火墙的开发进行了详细的介绍和描述。通过本文可以清楚地看到一个普通个人防火墙的开发过程。本防火墙中，用户可以自行设定过滤规则，以达到对不同源和不同目标的IP地址、端口和协议的过滤。程序可以最小化为系统托盘图标，在后台提供数据包过滤，为用户提供保护。允许用户将当前规则保存为*.rul的文件格式，供下次使用时直接导入。同时允许添加程序于开机启动项，使用户使用本程序更为便捷。 关键词：个人防火墙，包过滤，网络安全Abstract With the development of the Internet, security control equipment must be installed to ensure safety when the network involves a different level of trust. These control device are almost always some kind of firewall. With the growing problem of network security, the most users are increasingly concerning about network security products. Firewall, which is not only the first network security products but also has the most users, has been favored by users and RD institutions. The personal firewall used in PC has largely become the protector of individual users’ security. This article describes the development of personal firewall status, some technical characteristics of VC++6.0 and the MFC program, then gives a detailed introduction and description of a packet-filtering-based individual firewall’s development. A simple personal firewall development process can be clearly seen through this article. In the firewall, users can set their own filtering rules, in order to attain the filtering with different source IP, destination IP, source port, destination port and protocol. Program can be minimized into the system tray icon, protecting user in the background. It allows users to save the current rules into a file as *.rul. The rule file can be imported when needed. The firewall also allows users to make the program initial when system starts and start filtering when the program starts, which makes the firewall more convenient. Keywords：Personal Firewall, Packet Filter, Network Security目录 1 绪论 1 1.1 1 1.2 研究意义 2 2 需求分析 3 2.1 功能需求 3 2.2 开发工具 3 系统设计 8 3.