A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Generation of ICMPv6 Echo Replies for Teredo Clients
Author(s) : T. Savolainen, R. Denis-Courmont
Filename : draft-denis-icmpv6-generation-for-teredo-01.txt
Pages : 8
Date : 2009-09-16
Teredo uses return routing to discover the closest Teredo relay
corresponding to any given peer. Discovery is achieved by sending an
ICMPv6 Echo Request and waiting for the appropriate relay to forward
the ICMPv6 Echo Reply back. Unanswered ICMPv6 Echo Requests make
Teredo clients assume that the peer is unreachable. This document
identifies two scenarios where a stateful middlebox can detect the
lack of ICMPv6 Echo Reply and craft one for the Teredo client in
order to avoid possibly erroneous peer unreachability assumptions.
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