To those of you wondering whether I have actually tried the steps mentioned here, I am the idiot who actually did all this. I made a Raspberry Pi server (without dynamic IP or DNS) just to test whether the 8-page article I wrote actually works. I shut it down after running it for about 2 minutes (I soon figured out my ever-useful Raspberry Pi Zero would not survive a single DDos attack (distributed denial-of-service attack- basically, so many devices try to access a website that the server overheats and explodes. Usually the aim is to shut down the website.) Guess it will now be used for hosting a minetest server as soon as I get how to do it