•SHADOW
•http://www.nswc.navy.mil/ISSEC/CID/
•http://www.nswc.navy.mil/ISSEC/CID/step.htm
•http://www.nswc.navy.mil/ISSEC/CID/step_tar.gz
•The SANS Institute
•http://www.sans.org
•Network Intrusion Detection FAQ
•http://www.robertgraham.com/pubs/network-intrusion-detection.html
•http://www-rnks.informatik.tu-cottbus.de/~sobirey/ids.html
•http://www.sans.org/newlook/resources/IDFAQ/ID_FAQ.htm
•Questa presentazione
•http://www.pd.infn.it/~gravino/computing/security/meeting/