Protecting network-enabled industrial control systems from both external and internal threats is critical to preventing costly intellectual property theft and ensuring cybersecurity. In this white paper, we discuss five major categories of hacking afflicting today’s industrial control systems, and identify some simple hardware devices and settings that can help protect against these threats. Although no piece of hardware can protect your systems from the most advanced hackers, using the “right” hardware in tandem with comprehensive security policies can significantly reduce your risk.