Lookup edge service providers like Cloudflare or Akamia. If you’re hosted by a large cloud provider then look into their free and premium edge services offering

Lookup edge service providers like Cloudflare or Akamia. If you’re hosted by a large cloud provider then look into their free and premium edge services offerings. Traffic can be filtered to allow legit users, and consider scaling up servers too if cost of downtime outweighs cost of edge services and scaling up.