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Manufacturer Usage Description (MUD) is a proposed IETF
standard enabling local area networks (LAN) to automatically
configure their access control when adding a new IoT device
based on the recommendations provided for that device by the
manufacturer. MUD has been proposed as an isolation-based
defensive mechanism with a focus on devices in the home,
where there is no dedicated network administrator. In this
paper, we describe the efficacy of MUD for a generic IoT
device under different threat scenarios in the context of the
Fog. We propose a method to use rate limiting to prevent end
devices from participating in denial of service attacks (DDoS),
including against the Fog itself. We illustrate our assumptions
by providing a possible real world example and describe the
benefits for MUD in the Fog for various stakeholders.
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