... commercial intrusion detection systems still turn to Snort to fill in the gaps. The creator of Snort, Marty Roesch, originally envisioned Snort as a lightweight intrusion detection system, and it ... Katie. xi 295 _Snort_ 2e_01.qxd 5/4/04 4:50 PM Page 4040 Chapter 1 • Intrusion Detection Systems Damage & Defense… Evasion, and Denial of Service: Eluding Network Intrusion Detection, ” describing ... like Snort. What Is Snort? Snort is a modern security application with three main functions: it can serve as a packet sniffer, a packet logger, or a Network-based Intrusion Detection System...