The IAB has revised its draft document on “Internet Denial of Service
Considerations.” This document provides an overview of possible
avenues for denial-of-service attack on Internet systems. The aim is
to encourage protocol designers and network engineers towards designs
that are more robust. We discuss partial solutions that reduce the
effectiveness of attacks, and how some solutions might inadvertently
open up alternative vulnerabilities.
http://www.ietf.org/internet-drafts/draft-iab-dos-03.txt