Securing the Internet of Things (IoT) has become increasingly difficult. Devices are often shipped with out-of-date operating systems and unmaintained code, which is littered with vulnerabilities. To add to the frustration, traditional security tools cannot be installed on many of these devices. This presentation will demonstrate how open-source software, along with various other free tools, can be used to monitor, protect and mitigate against threats to IoT environments. The session will explore how all of these technologies and methods can be deployed on inexpensive hardware, such as the Raspberry Pi.