The Internet of Things (IoT) has brought a wealth of new technologies both in homes and businesses onto IP networks not natively designed to securely support such myriad devices. Networks once hosting only computers and printers now routinely contain payment systems, Wi-Fi and mobile/wearable devices, VoIP phones, vending machines, sensor and alarm systems, servers, security cameras, thermostats, door locks and other building controls, just to name a few. This chapter analyzes current best practices for securing computer networks with special attention to IoT challenges, discusses selected major IoT security incidents, details selected IoT cyber attacks as proofs of concept, and presents a framework for securely deploying IoT devices in the enterprise and at home.