* [[https://www.redhat.com/en/blog/using-nftables-red-hat-enterprise-linux-8|Great introduction]]
  * [[https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/getting-started-with-nftables_configuring-and-managing-networking|product docs]]
  * https://wiki.nftables.org/wiki-nftables/index.php/Stateful_objects

<code>
nft list tables
nft list table firewalld

nft add chain firewalld output { type filter hook output priority 0 \; }
nft add rule firewalld output ip daddr 8.8.8.8 counter
nft add rule firewalld output tcp dport 80 counter

nft list chain firewalld output 
nft list chain firewalld output -n -a

nft add chain firewalld input { type filter hook input priority 0 \; }
nft add rule firewalld input tcp dport 80 counter
nft add rule firewalld input tcp dport 443 counter
</code>