Can't connect using domain

[drforse]

I have a domain for my IP, and it works fine if I start a simple python server listening to incoming requests, but if I try to put the domain in minecraft interface, the connection doesn't work, while with IP it does, and the same goes to checking the server status here: https://mcsrvstat.us/
I suppose the minecraft server limits incoming requests to the IP? How can I fix it?

[drforse]

The problem was actually with cloudflare that I used on my domain. It drops the connection for some reason.