I mentioned already that I now have more than 25 years of professional experience in #InfoSec.

If I do remember correctly, one of my first experimental installations of an #IntrusionDetectionSystem (#IDS) was the #NetworkFlightRecorder around 2000, together with one of the early #VulnerabilityScanner-s called "Satan".

Shortly after that, we began to develop our own distributed IDS based on #Snort.

https://www.usenix.org/legacy/publications/library/proceedings/lisa97/full_papers/01.ranum/01_html/main.html

https://en.wikipedia.org/wiki/Security_Administrator_Tool_for_Analyzing_Networks