Understanding BGP Flow Spec for DDoS Mitigation

The chapter explores BGP Flow Spec, emphasizing its application for mitigating DDoS attacks by dynamically advertising firewall policies based on specified traffic matching criteria. It discusses the technical aspects of BGP Flow Spec, including NLRI extension, matching criteria, and attaching communities to routes for actions. The chapter also highlights the scalability benefits of integrating Flow Spec into BGP, comparing manual configuration of ACL rules to the automated and granular filtering provided by BGP Flow Spec.