1. Bro. http://www.bro-ids.org . Accessed 14 Nov 2010
2. Publicly available library of malwares (VX Heavens). http://vx.netlux.org/ . Accessed 14 Nov 2010
3. Snort. http://www.snort.org/ . Accessed 14 Nov 2010
4. Tcpdump. http://www.tcpdump.org . Accessed 14 Nov 2010
5. Tcptrace. http://www.tcptrace.org . Accessed 14 Nov 2010