Network Working Group G. Huston
Request for Comments: 4159 APNIC
BCP: 109 August 2005
Category: Best Current Practice
Deprecation of "ip6.int"
Status of This Memo
This document specifies an Internet Best Current Practices for the
Internet Community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2005).
Abstract
This document advises of the deprecation of the use of "ip6.int" for
Standards Conformant IPv6 implementations.
1. IPv6 Standards Action
In August 2001 the IETF published [RFC3152], which advised that the
use of "ip6.int" as the domain for reverse-mapping of IPv6 addresses
to DNS names was deprecated. The document noted that the use of
"ip6.int" would be phased out in an orderly fashion.
As of 1 September 2005, the IETF advises the community that the DNS
domain "ip6.int" should no longer be used to perform reverse mapping
of IPv6 addresses to domain names, and that the domain "ip6.arpa"
should be used henceforth, in accordance with the IANA Considerations
described in [RFC3596]. The domain "ip6.int" is deprecated, and its
use in IPv6 implementations that conform to the IPv6 Internet
Standards is discontinued.
The Regional Internet Registries (RIRs) are advised that maintenance
of delegation of entries in "ip6.int" is no longer required as part
of infrastructure services in support of Internet Standards
Conformant IPv6 implementations as of 1 September 2005. The RIRs are
requested to work with their communities to adopt a schedule
regarding the cessation of support of registration services for the
"ip6.int" domain.
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RFC 4159 ip6.int August 2005
2. IANA Considerations
IANA is advised that the "ip6.int" domain for reverse mapping of IPv6
addresses to domain names is no longer part of Internet Standards
Conformant support of IPv6 as of 1 September 2005.
3. Security Considerations
While DNS spoofing of address to name mapping has been exploited in
IPv4, removal of the "ip6.int" zone from the standard IPv6
specification creates no new threats to the security of the internet.
4. Acknowledgements
The document was prepared with the assistance of Kurt Lindqvist,
Thomas Narten, Paul Wilson, David Kessens, Bob Hinden, Brian
Haberman, and Bill Manning.
5. Normative References
[RFC3152] Bush, R., "Delegation of IP6.ARPA", BCP 49, RFC 3152,
August 2001.
[RFC3596] Thomson, S., Huitema, C., Ksinant, V., and M. Souissi, "DNS
Extensions to Support IP Version 6", RFC 3596, October
2003.
Author's Address
Geoff Huston
APNIC
EMail: gih@apnic.net
Huston Best Current Practice [Page 2]
RFC 4159 ip6.int August 2005
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Internet Society.
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