Protect IP from DDos

Hello.

Is there any possibility to protect IP address from DDos attacks? For some reasons I realy need to use IP instead of normal domain address. For example https://81.210.252.254/. Is there is any option to protect that kind of address?

Not unless you own that IP address (like a corporate network).

Cloudflare can only protect traffic to its own network, and can not proxy direct requests to your server.