一个很好用的杀毒软件，占用很少的内存

Windows Firewall Ports & Applications Manager -Windows Firewall Ports & Applications Manager

一个防火墙的源码，比较适合学习包过滤-a firewall source code, the more appropriate learning packet filtering

这是一个简单的防火墙，用VB开发的，功能很少，不过可以借鉴一下编程方法，很有用的-This is a simple firewall, using VB, functional little, but I can learn some lessons from programming, a very useful

windows 网络防火墙pdf+源码 描述了windows下spi的使用等技术 值得下载-windows network firewall pdf+ source described the use of windows under the spi technical merit Download

unix下的防火墙源码。强。-the firewall source. Strong.

针对ARP协议的安全漏洞以及它所造成的网络安全问题，使用了一种对ARP的数据包进行认证的机制-against ARP security holes and the resulting network security, the use of a pair of ARP packets of data authentication mechanism

基于费尔的Ndis Hook技术的网络监控系统 目录列表: TGuard 应用程序目录 TGuard_sys For 2k的驱动程序 Release 存放应用程序 Def 应用程序和驱动共用的一个定义文件 Tools 工具 安装: 将.sys文件放到windowssystem32driver目录下,导入Tools目录中installHook.reg,重启. 注意点: 支持winRoute,Winxp带的ics共享,isa Server, 不支持sygate. 对网卡无限制.-Ndis Hook Technology Network Monitoring System directory listings : TGuard application directory TGuard_sys For 2k Driver Release storage applications Def applications and drive a shared definition document Tools installation tool :. Sys documents into windows system32 driver directory, import Tools directory installHook.reg restart. attention : winRoute support, with the ICs Winxp sharing, isa Server, does not support Sygate. NIC unrestricted right.

Unix下检查不安全配置的程序 -Checking non-safe configuration in Unix

ipsec vpn的例子程序 主要是演示vpn-ipsec ipsecsample-app.rar

又一个防火墙源代码，是用VC做的，功能虽然比较简单，但对初学者有用吧-also a firewall source code is the use of VC do, even though it is relatively simple, but it useful for beginners