Minecraft Nitrado Whitelist?

I got a minecraft server from nitrado and played with my friends. I know myself, I would say very well, I set up the whitelist and it just got a player on it and had all the rights and I was just puzzling how to solve the problem set up permisson ex but that will certainly help very little since he had all rights

Ipban it, then it can never be on it again

Until his IP changes, which happens in Germany every 24 hours if you are not at a cable provider.

Who clicked that on you? The only way to change the ip would be with reverseproxy

Online mode true?

Whitelist also active?

Whitelisted in server.properties enforced?

Nonsense. If my router restarts, I get a new IP. Every time.

If you have set everything correctly, something like that Not happen.
If your friends have the necessary permissions, other players can add them to the whitelist and also give them rights.

Ask your friends if they have added anyone (if they have the necessary permissions).

Online mode on
whitelist also online but doesn't work
as forced

No, only I'm sitting on grade 3 to fix the problem but the white list does not apply

The whitelist does not become active immediately if it is changed; it only works if the server is restarted. In the server.properties you can force "enforce-whitelist" to True, then it becomes active immediately if you change it and everyone who is not in the list is kicked.