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add iptables rules example

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Swrup 2026-09-02 04:27:23 +02:00
parent 0278f24eef
commit 78f70f3b4d
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iptables.rules.example Normal file
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*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
:TCP - [0:0]
:UDP - [0:0]
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m conntrack --ctstate INVALID -j DROP
-A INPUT -p icmp -m icmp --icmp-type 8 -m conntrack --ctstate NEW -j ACCEPT
-A INPUT -p udp -m conntrack --ctstate NEW -j UDP
-A INPUT -p tcp --tcp-flags FIN,SYN,RST,ACK SYN -m conntrack --ctstate NEW -j TCP
-A INPUT -p udp -j REJECT --reject-with icmp-port-unreachable
-A INPUT -p tcp -j REJECT --reject-with tcp-reset
-A INPUT -j REJECT --reject-with icmp-proto-unreachable
-A UDP -p udp --dport 53 -j ACCEPT
-A TCP -p tcp --dport 53 -j ACCEPT
-A TCP -p tcp --dport 3434 -j ACCEPT
-A TCP -p tcp --dport 5432 -j ACCEPT
COMMIT