I recently completed a package of blogs for Corsa Technologies. They have a solid Denial of Service (DDoS) mitigation product with both a scale up and scale out design. Part 1 can be found here – Matt Conran Corsa Technologies, Part 2 can be found here – Matt Conran Corsa Technologies a Part 3 – Matt Conran DDoS mitigation, Part 4 – Matt Conran Security Disaggregation