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iptables filter表案例-13372947-51CTO博客
source link: http://blog.51cto.com/13382947/2066768
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第1章iptablesfilter表小案例案列：只针对filter表，预设策略INPUT链DROP，其他两个链ACCEPT，然后针对192.168.133.0/24开通22端口，对所有网段开放80端口，对所有网段开放21端口。#!/bin/bashipt="/usr/sbin/iptables"//命令的绝对路径，防止因为环境变量的问题导致命令无法执行$ipt-F//清空规则$
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