MikeB4: The IOT devices at home are behind a modem and router do the work there and things should be good. The peas in the freezer and the coffee will be sweet.
And the said IoF (Internet of Fail) device talking to your local router using upnp to open a port to the internet. Then services like shodan or other botnets scanning the interwebs and then using the open ports as an attack vector for the DDoS.