Hosting adimistration reports that your origin IP became known for attackers and the attack is forwarded to that address passing over SkyparkCDN. What should I do?
Ask the hosting provider for new IP. It would be better to have an IP from a different subnetwork.
In your firewall allow connections only from SkyparkCDN servers and trusted IPs and limit connections from others.
Tell us your new IP obtained from your hosting provider.