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iptable-飞飞
source link: http://blog.51cto.com/45545613/2083366
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iptable 组成四张表 1 raw 对IP包做状态跟踪 2 mangle 对IP包打标记 3 nat 做地址转换 4 filter(默认) 对IP包做过滤五条链 匹配IP包传输方向 1 INPUT 进入防火墙本机的IP包 2 OUTPUT 从防火墙出去的IP包 3 FORWARD 经过防火墙的包 4 POSTROUTI
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