OVH offers more than a firewall. They provide all of their OVHCloud customers with anti-DDoS services that will block most attacks automatically at no additonal charge. https://us.ovhcloud.com/security/anti-ddos/
AWS offers their Shield product, although your requirement of "reasonably priced" may exclude AWS in general https://aws.amazon.com/shield/ .
AWS offers their Shield product, although your requirement of "reasonably priced" may exclude AWS in general https://aws.amazon.com/shield/ .
Cloudflare Spectrum can protect TCP/UDP services including games, they actually call out Minecraft specifically. https://www.cloudflare.com/products/cloudflare-spectrum/mine...