Manufacturers and utilities that incorporate widely-available, low-cost internet protocol devices into their industrial control systems are at an increased risk for cyber-attacks. The National Institute of Standards and Technology (NIST), which is responsible for developing information security standards and guidelines to protect the nation’s critical infrastructures, recently published the Guide to Industrial Control Systems (ICS) Security, NIST Special Publication 800-82, Revision 2, released May 2015. This publication provides guidance on how to secure Industrial Control Systems (ICS), including Supervisory