Since coming into popular use in the late 1960s, industrial control systems (ICS) have become prevalent throughout all areas of industry and modern life. Whether in HVAC systems, elevators, power grids, water treatment plants, traffic lights, gas pipelines, manufacturing robots or any of the myriad other applications, industrial control systems govern much of our lives. This presentation will cover the basics of what an ICS/SCADA system is, a brief history of the technologies involved (and their security issues), a look at typical network protocols and network architectures used in ICS/SCADA systems, a glance at a typical (pentesting/red team) engagement and various attack strategies for succeeding as a pentester of industrial control systems.