If anyone wants to join my OpenTTD server, the game name is witches.town and the password is "tipsy". should be findable on the in-game server browser. (:
Probably just going to leave the server running today to see how it goes.
(final edit, sorry all)
@zyabin101 Use virtual LAN servers like hamachi.
I still think port forwarding is the best way, but whatever floats your boat.
I'm looking at https://localtunnel.github.io/www/: it allows running any server you want, and assigns a random localtunnel.me website to it (you can only use one port per local tunnel, however).
@TipsyTentacle Of course I knew it, but how can I avoid the fuss with port forwarding? >.>