Hi,
when I have a linux box with two NICs, one $EXTIF (external) and
one $INTIF (subnet=192.168.176.0/20). With ip masq turn on:
iptables -t nat -A POSTROUTING -o $EXTIF -j MASQUERADE
how do I block $INTIF(192.168.176/20) from accessing ports(ie: 80) on
the linux box(192.168.176.1), but still allow port 80 access using ip
masq to the outside world?
I tried the filters below, but I still can access port 80 after
applying the rules:
iptables -A INPUT -i $INTIF -p tcp -m tcp --dport 80 --syn -j DROP
iptables -A FORWARD -i $INTIF -p tcp -m tcp --dport 80 --syn -j DROP
iptables -A INPUT -p tcp -s 192.168.176.0/20 -d 192.168.176.1 --dport 80 -j DROP
anyone know if it's possible?
Thanks
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