I recently had the pleasure of addressing the Industrial Control Systems Joint Working Group (ICSJWG) within the U.S. Department of Homeland Security. They invited us to discuss the importance of monitoring industrial networks for comprehensive visibility, as well as present some views on how best to do so. I think that many OT professionals outside of that room—or anyone concerned with industrial cyber security—would also find some value in the topic, so I’d like to offer up a bit of the flavor of that discussion.