- IDN homograph attack - Wikipedia
- Hacking iLO — take a moment to secure your servers | Avast
- netfilter/iptables project homepage - netfilter.org -- https://serverfault.com/questions/1094354/how-do-i-display-the-entire-firewalld-state
- https://www.stackscale.com/blog/guide-setting-up-ssh-keys-linux/ 🉑 💂 ; https://www.cyberciti.biz/faq/how-to-set-up-ssh-keys-on-linux-unix/
- https://www.hostmaster.ua/dnssec/