API Firewall


I really don’t understand how I can use Cloudflare API Firewall, It’s not easy to understand, any video can show me how I can use the API Firewall system? and also Firewall for my server too!
I need to protect my API and no one can send or receive the request from backend API other than the front-end domain!

Best Regards,

Have you been following this tutorial?

Or are you just looking for a more general firewall to only let your server’s IP address connect to the API?