manage server firewall

I would love to be able to manage the server firewall from spanel.
We are getting regular ddos attacks that bypass cloudflare.
This is because anyone can find the possible used origin ip on sites like IP History - ViewDNS.info
So the ability to setup some sort of whitelist to only allow cloudflare ips would be amazing.
This would also include a default block for other ports such as ftp and ssh so you can whitelist users that needs access instead of exposing it to the world.