http://www.quadrunner.com/~chuegen/smurf/ contains extensively detailed information about the “Smurf” and “Fraggle” attacks, including an 8-page white paper on the attacks.

http://ds.internic.net/rfc/rfc2267.txt is a recently-published informational RFC describing implementation of filters to protect against origination and reception of some spoofed packets, written by Paul Ferguson and Daniel Senie.

http://www.security.mci.net/dostracker/ contains information about the MCI-developed DoSTracker tool designed to automate the process of tracking spoofed packets through a network using Cisco routers.

Other references found throughout this presentation also contain a wealth of information about the various attacks.