DNS64: DNS extensions for Network Address Translation from IPv6 Clients to IPv4 Servers

Document Type Replaced Internet-Draft (individual)
Authors Marcelo Bagnulo  , Andrew Sullivan  , Philip Matthews  , Iljitsch van Beijnum  , Masahito Endo 
Last updated 2009-07-06 (latest revision 2009-03-07)
Replaced by RFC 6147
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-behave-dns64
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


DNS64 is a mechanism for synthesizing AAAA records from A records. DNS64 is used with NAT64, an IPv6 IPv4 translator to enable client- server communication between an IPv6-only client and an IPv4-only server, without requiring any changes to either the IPv6 or the IPv4 node, for the class of applications that work through NATs. This document specifies DNS64, and provides suggestions on how it should be deployed in conjunction with NAT64.


Marcelo Bagnulo (marcelo@it.uc3m.es)
Andrew Sullivan (ajs@anvilwalrusden.com)
Philip Matthews (philip_matthews@magma.ca)
Iljitsch van Beijnum (iljitsch@muada.com)
Masahito Endo (masahito.endou@jp.yokogawa.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)