Linux 网络设置(防火墙，组播转发，wifi热点)
1、 iptables 配置防火墙，实现路由和网关等功能
http://baike.baidu.com/view/504557.htm
http://www.cnblogs.com/JemBai/archive/2009/03/19/1416364.html
http://linux.ccidnet.com/pub/html/tech/iptables/index.htm
http://linux.chinaunix.net/techdoc/net/2007/12/17/974490.shtml
2、 pimd 组播数据转发
http://wenku.baidu.com/view/70c346fe910ef12d2af9e747.html
http://blog.csdn.net/suiyuan19840208/article/details/8535892
http://hi.baidu.com/gaodi2002/item/f5831f180935fe633f87cef4
3、 hostapd wifi热点配置
http://www.cnblogs.com/zhuwenger/archive/2011/03/11/1980294.html
http://blog.csdn.net/yyplc/article/details/7301974
http://www.ibm.com/developerworks/cn/linux/l-wifiencrypthostapd/