1. Axent, Intruder Alert, http://www.axent.com/Axent/Products/IntruderAlert
2. J. Balasubramaniyan, J.O. Garcia-Fernandez, E.H. Spafford, D. Zamboni, Architecture for intrusion detection using autonomous agents, Department of Computer Sciences, Purdue University, Coast TR 98-05, 1998, http://www.cerias.purdue.edu/projects/aafid.html
3. CERT advisory CA-2000-01 on Tribal Flood Network and Stacheldraht Denial of Service Attacks. http://www.cert.org/advisories/CA-2000-01.html
4. CERT advisory CA-98.01 on the Smurf Denial of Service Attack. http://www.cert.org/advisories/CA-98.01.smurf.html
5. Cisco, NetRanger, http://www.cisco.com/univercd/cc/td/doc/product/iaabu/netrangr