Riorey

I've used them for a couple of years cool hardware they got performance wise it really does what it's supposed to do. I recommend it for people that wanted a more automated approach to DDoS Mitigation.

http://www.riorey.com/company-difference.html

It's quite kind for riorey to publish their Taxonomy of DDoS Attacks. pretty nice read.

http://www.riorey.com/x-resources/2011/RioRey_Taxonomy_DDoS_Attacks_2.2_2011.pdf