此方案适用于可以使用PF做为防火墙的操作系统，包括FREEBSD/OPENBSD/NETBSD。所谓的策略路由就是在服务器同时连接了两个ISP线路，实现从那个网卡进来的数据包请求，返回给CLIENT时还从那个网卡出去。

In this book, Javascr ipt is covered from its very beginning in the earliest Netscape browsers to the present-day incarnations flush with support for XML and Web Services. You learn how to extend the language to suit specific needs and how to creat