This paper is intended for customers who want to improve resiliency of their applications running on Amazon Web Services (AWS) against Distributed Denial of Service attacks. The paper provides an overview of Distributed Denial of Service attacks, techniques that can help maintain availability, and reference architectures to provide architectural guidance with the goal of improving your resiliency.
Download the paper from here – http://d0.awsstatic.com/whitepapers/DDoS_White_Paper_June2015.pdf