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#!/sbin/nft -f # Flush last ruleset : flush ruleset # Creation of the default table add table default # Creation of inbound and outbound flows add chain ip default INBOUND_TRAFFIC { type filter hook input priority 0; } add chain ip default OUTBOUND_TRAFFIC { type filter hook output priority 0; } # List of rules add rule default INBOUND_TRAFFIC tcp dport 22 accept add rule default OUTBOUND_TRAFFIC tcp sport 22 accept add rule default INBOUND_TRAFFIC tcp sport 80 accept add rule default OUTBOUND_TRAFFIC tcp dport 80 accept add rule default INBOUND_TRAFFIC tcp sport 443 accept add rule default OUTBOUND_TRAFFIC tcp dport 443 accept add rule default INBOUND_TRAFFIC udp sport 53 accept add rule default OUTBOUND_TRAFFIC udp dport 53 accept add rule default INBOUND_TRAFFIC icmp type echo-request accept add rule default OUTBOUND_TRAFFIC icmp type echo-reply accept # Close the firewall : add rule default INBOUND_TRAFFIC drop add rule default OUTBOUND_TRAFFIC drop
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