Mitigating Teredo Rooting Loop Attacks

Document Type Expired Internet-Draft (individual)
Author Fernando Gont 
Last updated 2012-07-13 (latest revision 2012-01-10)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Recently, a number of routing loop vulnerabilities were discovered in the Teredo mechanism, which typically result in a Denial of Service of the involved systems, possibly also affecting the intervening networks. This document describes a number of security checks that can be performed by Teredo hosts and Teredo servers such that these vulnerabilities are eliminated.


Fernando Gont (

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