Hello, thank you for your answer.
I set it to disabled, and the i wait 10 minutes, and using the url, cannot access to the site, not showing any Cloudfare Error.
The i set it to enabled and wait for 10 minutes and the error 521 appear.
If i put the ip like https://{mi_ip} i can access to my site. I use this page to check if the 80 port is opened… and it is… Cómo hacer un test de puertos abiertos online
so. what could happend.
Before i put the new ip, all works fine.
Now with the new public ip, i cannot, and i cannot back to the old ip.