Neighbor Discovery Shield (ND-Shield): Protecting against Neighbor Discovery Attacks

Document Type Expired Internet-Draft (individual)
Author Fernando Gont 
Last updated 2012-12-07 (latest revision 2012-06-05)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a mechanism that can be implemented in layer-2 devices to mitigate attack vectors based on Neighbor Discovery messages. It is meant to complement other mechanisms implemented in layer-2 devices such as Router Advertisement Guard (RA-Guard) and DHCPv6-Shield, with the goal of achieving a comprehensive IPv6 First Hop Security solution. This document is motivated by the desire to achieve feature parity with IPv4 with respect to First Hop Security mechanisms.


Fernando Gont (

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