Untitled

#!/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