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Network Working Group R. Bush
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Request for Comments: 3152 RGnet
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Updates: 2874, 2772, 2766, 2553, 1886
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Category: Best Current Practice
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Delegation of IP6.ARPA
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This document specifies an Internet Best Current Practices for the
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Internet Community, and requests discussion and suggestions for
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improvements. Distribution of this memo is unlimited.
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Copyright (C) The Internet Society (2001). All Rights Reserved.
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This document discusses the need for delegation of the IP6.ARPA DNS
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zone, and specifies a plan for the technical operation thereof.
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In the IPv6 address space, there is a need for 'reverse mapping' of
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addresses to DNS names analogous to that provided by the IN-ADDR.ARPA
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The IAB recommended that the ARPA top level domain (the name is now
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considered an acronym for "Address and Routing Parameters Area") be
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used for technical infrastructure sub-domains when possible. It is
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already in use for IPv4 reverse mapping and has been established as
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the location for E.164 numbering on the Internet [RFC2916 RFC3026].
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IETF consensus was reached that the IP6.ARPA domain be used for
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address to DNS name mapping for the IPv6 address space [RFC2874].
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This document deprecates references to IP6.INT in [RFC1886] section
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2.5, [RFC2553] section 6.2.3, [RFC2766] section 4.1, [RFC2772]
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section 7.1.c, and [RFC2874] section 2.5.
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In this context, 'deprecate' means that the old usage is not
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appropriate for new implementations, and IP6.INT will likely be
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phased out in an orderly fashion.
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RFC 3152 Delegation of IP6.ARPA August 2001
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3. IANA Considerations
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This memo requests that the IANA delegate the IP6.ARPA domain
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following instructions to be provided by the IAB. Names within this
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zone are to be further delegated to the regional IP registries in
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accordance with the delegation of IPv6 address space to those
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registries. The names allocated should be hierarchic in accordance
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with the address space assignment.
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4. Security Considerations
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While DNS spoofing of address to name mapping has been exploited in
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IPv4, delegation of the IP6.ARPA zone creates no new threats to the
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security of the internet.
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[RFC1886] Thomson, S. and C. Huitema, "DNS Extensions to support IP
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version 6", RFC 1886, December 1995.
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[RFC2553] Gilligan, R., Thomson, S., Bound, J. and W. Stevens,
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"Basic Socket Interface Extensions for IPv6", RFC 2553,
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[RFC2766] Tsirtsis, G. and P. Srisuresh, "Network Address
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Translation - Protocol Translation (NAT-PT)", RFC 2766,
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[RFC2772] Rockell, R. and R. Fink, "6Bone Backbone Routing
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Guidelines", RFC 2772, February 2000.
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[RFC2874] Crawford, M. and C. Huitema, "DNS Extensions to Support
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IPv6 Address Aggregation and Renumbering", RFC 2874, July
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[RFC2916] Faltstrom, P., "E.164 number and DNS", RFC 2916,
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[RFC3026] Blane, R., "Liaison to IETF/ISOC on ENUM", RFC 3026,
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Bush Best Current Practice [Page 2]
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RFC 3152 Delegation of IP6.ARPA August 2001
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Bainbridge Island, WA US-98110
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Phone: +1 206 780 0431
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Bush Best Current Practice [Page 3]
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RFC 3152 Delegation of IP6.ARPA August 2001
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Full Copyright Statement
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Copyright (C) The Internet Society (2001). All Rights Reserved.
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This document and translations of it may be copied and furnished to
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others, and derivative works that comment on or otherwise explain it
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or assist in its implementation may be prepared, copied, published
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and distributed, in whole or in part, without restriction of any
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kind, provided that the above copyright notice and this paragraph are
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included on all such copies and derivative works. However, this
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document itself may not be modified in any way, such as by removing
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the copyright notice or references to the Internet Society or other
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Internet organizations, except as needed for the purpose of
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developing Internet standards in which case the procedures for
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copyrights defined in the Internet Standards process must be
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followed, or as required to translate it into languages other than
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The limited permissions granted above are perpetual and will not be
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revoked by the Internet Society or its successors or assigns.
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This document and the information contained herein is provided on an
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"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
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TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
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BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
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HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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Funding for the RFC Editor function is currently provided by the
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