1iptables-translate -A INPUT -p tcp -i eth0 --sport 53 -j ACCEPT 2nft add rule ip filter INPUT iifname "eth0" tcp sport 53 counter accept 3 4iptables-translate -A OUTPUT -p tcp -o eth0 --dport 53:66 -j DROP 5nft add rule ip filter OUTPUT oifname "eth0" tcp dport 53-66 counter drop 6 7iptables-translate -I OUTPUT -p tcp -d 8.8.8.8 -j ACCEPT 8nft insert rule ip filter OUTPUT ip protocol tcp ip daddr 8.8.8.8 counter accept 9 10iptables-translate -I OUTPUT -p tcp --dport 1020:1023 --sport 53 -j ACCEPT 11nft insert rule ip filter OUTPUT tcp sport 53 tcp dport 1020-1023 counter accept 12 13iptables -A INPUT -p tcp --tcp-flags ACK,FIN FIN -j DROP 14nft add rule ip filter INPUT tcp flags & fin|ack == fin counter drop 15 16iptables-translate -A INPUT -p tcp --syn -j ACCEPT 17nft add rule ip filter INPUT tcp flags & (fin|syn|rst|ack) == syn counter accept 18 19iptables-translate -A INPUT -p tcp --syn --dport 80 -j ACCEPT 20nft add rule ip filter INPUT tcp dport 80 tcp flags & (fin|syn|rst|ack) == syn counter accept 21 22iptables-translate -A INPUT -f -p tcp 23nft add rule ip filter INPUT ip frag-off & 0x1fff != 0 ip protocol tcp counter 24 25iptables-translate -A INPUT ! -f -p tcp --dport 22 26nft add rule ip filter INPUT ip frag-off & 0x1fff 0 tcp dport 22 counter 27