求助
哪位高手能给我解释下面的语句吗？iptables -t nat -P PREROUTING DROP
iptables -t nat -A PREROUTING -s 192.168.1.104 -m mac --mac-source ! 00-13-D3-3C-D1-71 -j DROP
iptables -t nat -A PREROUTING -s 192.168.1.104 -j ACCEPT
iptables -t nat -A PREROUTING -s 192.168.1.105 -m mac --mac-source ! 00-13-D3-3C-CE-20 -j DROP
iptables -t nat -A PREROUTING -s 192.168.1.105 -j ACCEPT
iptables -t nat -A PREROUTING -s 192.168.1.106 -m mac --mac-source ! 00-13-D3-3C-D1-72 -j DROP
iptables -t nat -A PREROUTING -s 192.168.1.106 -j ACCEPT
iptables -t nat -A PREROUTING -s 192.168.1.107 -m mac --mac-source ! 00-13-D3-3C-CF-3F -j DROP
iptables -t nat -A PREROUTING -s 192.168.1.107 -j ACCEPT
大致意思我明白，我想了解详细点，并想将这将第一句改为限网段如192.168.1.1/24都绑定 其它网段不绑定 规则写的极锉，谁写的？
NAT表中最好只有SNAT和DNAT两个target
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