Hello, I am currently an System Administrator on the UNIX/Workstation side and very involved with end node issues. I have joined the list because of my interest in security and Intrusion Detection Systems. I am not a novice with Detection Systems however one can never know enough on this subject. Art Nichols TRW (310) 814-7536 Space & Electronics Group nichols@gilgalad.sp.trw.com Redondo Beach, CA.