User Guide for Cisco Security MARS Local and Global Controllers, Release 6.x - Botnet Traffic Filtering [Cisco Security Monitoring, Analysis and Response System] - Cisco Systems
Ciro Tammaro's Blog: - Cisco Networking: Combating Botnets Using the Cisco ASA Botnet Traffic Filter
Botnet - Wikipedia
User Guide for Cisco Security MARS Local and Global Controllers, Release 6.x - Botnet Traffic Filtering [Cisco Security Monitoring, Analysis and Response System] - Cisco Systems