Luigi123, thank you very much for the feedback, I don't know if I didn't understand or if it is because the changes are not made on time and you need to wait some time, but I already had remote mysql active, there was already an IP number I was using, then I put my external ip, then I put my nons dns, then I just put%, I also tried part of the external ip with%, and it continues with the same error.
I don't know how to put it anymore.