There's Protocol, Port Range, Translate to… Trigger Protocol and Trigger Port. What should i put in those boxes
How to port forward Minecraft? - 1
Guest
Protocol TCP
Port range 25565 - 25565
Translate to 25565
(It's a single port and no translation, so the same number everywhere).
Trigger protocol & port can be blank, or TCP / 25565 if it won't save without an entry.
Once the rule is created and saved, you need to add the minecraft server using that saved rule.
Robert J