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For several years, trending observed has shown the ever-increasing growth of network-connected 'things'-items like appliances, lighting, controllers and, others that have not typically been network connected in the past. This has resulted in a significant increase in attack surface in networks that connect these devices, as many of these 'things' have not been designed or implemented with security in mind. While the industry continues to work with these manufacturers to offer better, more secure alternatives, there are many devices out there today that present a risk. To combat this issue, and to help mitigate this risk, we present PioT. PioT is a RaspberryPi-based device intended to be placed in front of vulnerable IoT devices. In conjunction with traffic monitoring and logging tools, PioT is intended to be a robust, expandable platform for monitoring and responding to attempted access to vulnerable IoT devices. In this paper, we will outline the PioT build process and show the capability to observe access to an IoT device. The total cost for this build is less than $100.

PiOT - a small form factor defense for indefensible devices