Further reading
- 25 iptables netfilter firewall examples: https://www.cyberciti.biz/tips/linux-iptables-examples.html
- Linux IPv6 how-to: http://tldp.org/HOWTO/html_single/Linux+IPv6-HOWTO/
- Recommendations for Filtering ICMPv6 Messages in Firewalls: https://www.ietf.org/rfc/rfc4890.txt
- nftables wiki: https://wiki.nftables.org/wiki-nftables/index.php/Main_Page
- nftables examples: https://wiki.gentoo.org/wiki/Nftables/Examples