Microsoft Windows Update - Latest bug fixes for Microsoft Windows, including fixes for some possible DoS attacks.
Network Ingress Filtering - A simple, effective, and straightforward method for network administrators to prohibit DoS attacks which use forged IP addresses.
Protecting Networks from DoS Attacks - Solution paper on the use of bandwidth management to protect networks from distributed denial of service attacks and malicious traffic.
SecurityFocus - Site maintains an database of vulnerabilities and solutions including Denial Of Service attacks.
Smurf Amplifier Registry - The Smurf Amplifier Registry (SAR) lets you probe Internet connected IP networks to see whether or not they are configured in a way that will allow perpetrators to use them for smurf amplification.
Smurf Attack Information - White paper describing and providing practical information on how to minimize the effects of smurf attacks.
Trinoo Analysis - An analysis of the DoS Project's trin00 master/slave programs, which implement a distributed network denial of service tool.
Webscreen Technology - Offers filtering appliances with DDoS mitigation features.
Whatis Definition of Denial of Service - Definition plus discussion of various types of DoS attacks and how they work, including Buffer Overflow, SYN, Teardrop and Smurf.
Zombie Zapper - Free, open source tool that can tell a zombie system to stop flooding. Zombie Zapper works against Trinoo, TFN, Stacheldraht, Troj_Trinoo (the trinoo daemon ported to Windows), and Shaft.
GCN.com: How to Stop a Service Denial Attack Before It Stops You - Shawn P. McCarthy provides a quick overview of various kinds of Distributed Denial of Service (DDoS) attacks. He also explains why defending against this type of attack requires upstream infrastructure providers to cooperate with the victim.
Stacheldraht Analysis - An analysis of "stacheldraht", a distributed denial of service attack tool, based on source code from the "Tribe Flood Network" distributed denial of service attack tool.