As the welcoming message suggested, I am sending an introductory message. I used to be a Telecommunications Operations Supervisor on a fairly large network, then moved over to become a programmer working on the development of financial systems. Got the opportunity to become a telecommunications engineer and took it. Then the company was reorganized, followed by downsizing, followed by rightsizing and now I find myself assigned to the thankless job of network security (but its still a job). My network security training is minimal and I find technology and systems changing so fast that I am often left looking puzzled and scratching my head. Consequently, I hope to learn something of value about network intrusion detection from this list. Brian Smith