使用openswan开源软件搭建自己的ipsec vpn

des算法的实现-des Algorithm Implementation

NetBSD和FreeBSD上实现的IKEv1协议，支持共享密钥、证书，支持主模式、野蛮模式和快速模式等-NetBSD and FreeBSD achieve IKEv1 agreement, support shared keys, certificates, support the main mode of barbaric and fast mode mode

防火墙的使用和原理-firewalls and the use of Principle

简单防火墙-Simple firewall

只要系统是win2k以上的,开启系统内的防火墙，学习防火墙编成 -win2k as long as the system is more open system within the firewall, the firewall into learning

本文件进行了实施测试通过的，但如果访问不了非本机的服务器，可查看你是否启动了个人防火墙，本程序没有解决个人防火墙问题。-this document for the implementation of the test, but if not visit the non-server machines, you can check whether or not to launch a personal firewall, this procedure does not solve the problem of personal firewall.

本人花重金购买的防火墙源程序-I spent huge sums of money to buy the source firewall

一个很好用的杀毒软件，占用很少的内存-a good use of antivirus software, which takes up very little memory!

VOIP和网络通信中使用ETUN、TURN和CIE穿越NAT防火墙-NAT Traversal for VoIP and Internet Communications using STUN, TURN and ICE

tdi编程例子，个人防火墙编程用得到。-A tdi example, and it may be used in presonal firewall.