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iptables basic rules
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| *filter | |
| :INPUT DROP [0:0] | |
| :FORWARD DROP [0:0] | |
| :OUTPUT ACCEPT [332:50026] | |
| :ICMP - [0:0] | |
| :TCP - [0:0] | |
| :UDP - [0:0] | |
| -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT | |
| -A INPUT -i lo -j ACCEPT | |
| -A INPUT -p icmp -j ICMP | |
| -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m conntrack --ctstate NEW -j TCP | |
| -A INPUT -p udp -m conntrack --ctstate NEW -j UDP | |
| -A TCP -p tcp -m tcp --dport 80 -j ACCEPT | |
| -A TCP -p tcp -m tcp --dport 443 -j ACCEPT | |
| -A ICMP -j DROP | |
| -A TCP -j REJECT --reject-with icmp-port-unreachable | |
| -A UDP -j REJECT --reject-with icmp-port-unreachable | |
| COMMIT |
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