一个轻量级的nat穿越服务器端，源码质量很高，很适合学习编程，特别是编写网络程序的人学习。-a lightweight nat through the server, the source of high quality, very suitable for learning programming, Special procedures for the preparation of network learning from the people.

Sock5编程，透过服务器sock5代理访问防火墙外的程序。-Sock5 programming through server sock5 Acting visit outside the firewall procedures.