Mitigating multi-hundred-gigabit distributed denial-of-service (DDoS) attacks requires combining BGP Anycast route announcement with automated scrubbing centers and BGP Flowspec rate limiting.
1. Multi-Tiered DDoS Defense Architecture
- BGP Anycast Ingestion: Announcing the identical /24 IPv4 prefix across 200+ global edge Points of Presence (PoPs) to naturally fragment and absorb volumetric attack traffic locally.
- BGP Flowspec (RFC 5575): Dynamically injecting fine-grained traffic filtering rules into upstream transit provider edge routers to drop malicious UDP reflection attack vectors at the transit boundary.
- GRE Tunnel Backhaul: Clean, scrubbed HTTP/TCP traffic is encapsulated in Generic Routing Encapsulation (GRE) tunnels and routed directly to origin datacenters.