draft-ymbk-6to4-arpa-delegation-00.txt revision df4c20903e3a291a1f784992846c0400189b04a7
Network Working Group R. Bush
Internet-Draft IIJ
Expires: August 14, 2003 J. Damas
February 13, 2003
Delegation of 2.0.0.2.ip6.arpa
Status of this Memo
This document is an Internet-Draft and is in full conformance with
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Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This document discusses the need for delegation of the
2.0.0.2.ip6.arpa DNS zone in order to enable reverse lookups for 6to4
addresses.
1. 6to4 and DNS
6to4 [RFC3056] provides a mechanism for IPv6 native hosts to
communicate over IPv4 clouds without explicit tunnel setup.
6to4 and DNS [I-D.moore-6to4-dns] describes methods to find the
delegation path for reverse lookups of 6to4 addresses in the DNS.
Section 3.1 of the I-D describes a simple method, using established
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mechanisms at the RIRs, that would enable such a mechanism to be
deployed using a minimum of additional setup.
Under the described method, the holders of IPv4 address space can
request the delegation of a sub-zone in the 2.0.0.2.ip6.arpa DNS tree
from the party from which they obtained the corresponding IPv4
in-addr.arpa delegation (or the holder of an even shorter IPv4 prefix
if their immediate parent is not configured for ip6.arpa), following
the mapping of IPv4 delegations. This sub-zone can then be populated
by the entity deploying the 6to4 infrastructure.
2. IANA Considerations
This memo requests that the IANA delegate the 2.0.0.2.IP6.ARPA domain
to the RIRs as will be described in instructions to be provided by
the IAB. Names within this zone are to be further delegated within
the regional IP registries and ISPs in accordance with the delegation
of IPv4 address space.
3. Security Considerations
While DNS spoofing of address to name mapping has been exploited in
IPv4, delegation of the 2.0.0.2.ip6.arpa zone creates no new threats
to the security of the internet.
Normative References
[RFC3056] Carpenter, B. and K. Moore, "Connection of IPv6 Domains
via IPv4 Clouds", RFC 3056, February 2001.
Informative References
Moore, K., "6to4 and DNS", draft-moore-6to4-dns-03 (work
in progress), October 2002.
Authors' Addresses
Randy Bush
IIJ
5147 Crystal Springs
Bainbrisge Island, WA 98110
US
Phone: +1 206 780 0431
EMail: randy@psg.com
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Joao Damas
Amsterdam,
The Netherlands
Phone:
EMail: joao@psg.com
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