Telephone Number Mapping E. Guy
Internet-Draft CleverSpoke
Intended status: Informational K. Darilion
Expires: August 19, 2011 nic.at
February 15, 2011
IANA Registration for Enumservice 'iax'
draft-ietf-enum-iax-08
Abstract
[Note for RFC-Editor: Please replace any instance of RFC XXXX with
the RFC number of draft-ietf-enum-enumservices-guide before
publication]
This document registers an Enumservice for the IAX protocol according
to the guidelines given in RFC XXXX.
Status of this Memo
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This Internet-Draft will expire on August 19, 2011.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. IANA Registration . . . . . . . . . . . . . . . . . . . . . . 3
3. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Simple IAX URI . . . . . . . . . . . . . . . . . . . . . . 5
3.2. IAX URI with a context . . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
6. DNS Considerations . . . . . . . . . . . . . . . . . . . . . . 6
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 6
8. Draft Changes . . . . . . . . . . . . . . . . . . . . . . . . 6
8.1. Changes since draft-ietf-enum-iax-07 . . . . . . . . . . . 6
8.2. Changes since draft-ietf-enum-iax-06 . . . . . . . . . . . 7
8.3. Changes since draft-ietf-enum-iax-05 . . . . . . . . . . . 8
8.4. Changes since draft-ietf-enum-iax-04 . . . . . . . . . . . 8
8.5. Changes since draft-ietf-enum-iax-03 . . . . . . . . . . . 8
8.6. Changes since draft-ietf-enum-iax-02 . . . . . . . . . . . 9
8.7. Changes since draft-ietf-enum-iax-01 . . . . . . . . . . . 9
8.8. Changes since draft-guy-iaxenum-00 . . . . . . . . . . . . 9
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9.1. Normative References . . . . . . . . . . . . . . . . . . . 9
9.2. Informative References . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 10
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1. Introduction
The E.164 to Uniform Resource Identifiers (URI) [RFC3986] Dynamic
Delegation Discovery System (DDDS) Application (ENUM)
[I-D.ietf-enum-3761bis] transforms E.164 [E164] numbers into Uniform
Resource Identifiers (URIs) using the Domain Name System (DNS)
[RFC1035].
IAX (Inter-Asterisk eXchange) [RFC5456] is an "all in one" protocol
for handling multimedia in IP networks. It combines both control and
media services in the same protocol.
This document registers an Enumservice for the IAX [RFC5456] protocol
according to the guidelines given in
draft-ietf-enum-enumservices-guide
[I-D.ietf-enum-enumservices-guide].
2. IANA Registration
[Note for RFC-Editor: Please replace any instance of rfcTHIS with the
RFC number of this document before publication]
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Protocol-Based
iax
iax
The 'iax' Enumservice indicates that the resource
identified by E.164 phone number is capable
of being contacted using the IAX protocol
according to the associated
IAX URI.
A client selecting this NAPTR needs to be able to support
communication utilizing the IAX protocol.
There are no specific security issues with this Enumservice.
However, the general considerations of
Section 4 apply.
COMMON
Ed Guy
CleverSpoke, Inc
mailto:edguy@CleverSpoke.com
2010-11-01
3. Examples
The following examples are just for illustrative purposes and will in
no way limit the usage of the 'iax' Enumservice to other usage
scenarios.
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3.1. Simple IAX URI
The following NAPTR resource record is an example of the 'iax'
Enumservice.
$ORIGIN 8.4.1.0.6.4.9.7.0.2.4.4.e164.arpa.
@ IN NAPTR ( 10 100 "u" "E2U+iax"
"!^.*$!iax:example.com/alice!" . )
This contact information indicates that the party addressed by the
E.164 number +442079460148 can be contacted using the IAX protocol to
domain 'example.com'. The called party, service, or program on that
domain is identified by 'alice'.
3.2. IAX URI with a context
The following is an example of the 'iax' Enumservice using an IPv6
destination address and a destination 'context'.
$ORIGIN 9.4.1.0.6.4.9.7.0.2.4.4.e164.arpa.
@ IN NAPTR ( 10 100 "u" "E2U+iax"
"!^.*$!iax:[2001:db8::1]:4569/alice?friends!" . )
This NAPTR resource record indicates that +442079460149 may be
contacted by using the IAX protocol at IPv6 address 2001:db8::1, port
4569 with the called party 'alice' in the context (or user partition)
'friends'. For further usage of IAX URIs see Section 2 of [RFC5456].
4. Security Considerations
The 'iax' Enumservice does not introduce any new security issues
beyond any already present in the ENUM, DNS and IAX protocols except
that this Enumservice provides for disclosure of information that may
facilitate an attack or a violation of user privacy in some way. The
primary result of these exploits is unwanted communications. These
issues are discussed in further detail in [RFC3833].
The use of DNSSEC [RFC4033] is recommended to improve operational
security.
5. IANA Considerations
This document requests registration of the 'iax' Enumservice
according to the guidelines and specifications in
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draft-ietf-enum-enumservices-guide [I-D.ietf-enum-enumservices-guide]
and the definitions in Section 2 in this document.
6. DNS Considerations
Misconfiguration or delays in zone changes can result in call loops,
perhaps with different protocols or networks. Implementations should
take care to ensure such loops can be detected without interrupting
other services including SIP-based, IAX-based, and DNS itself.
7. Acknowledgments
This work was supported by Internet Foundation Austria. In addition,
thanks to Michael Haberler, Bernie Hoeneisen and Richard Stastny for
their support and guidance in writing this document.
8. Draft Changes
[Note to RFC-Editor: This section is to be removed before publishing.
XML source is available upon request.]
8.1. Changes since draft-ietf-enum-iax-07
* KD: Changed DNSSEC reference from RFC4035 to RFC4033, which gives
an overview about DNSSEC
* KD: in first example renamed "chas" to "alice" as it is IMO a more
common and meaningful used term in examples
* KD: Removed the example with priorities (this RFC is about the
Enumservice registration and not about ENUM itself). Remove the
example with the context as the IPv6 example also uses a context.
Changed description and title of remaining examples.
* KD: Added introducery text to Examples section
* KD: DNS considerations: removed reference to SIP ENUM RFC as the
SIP ENUM RFC does not have a DNS Consideration section.
* KD: ordered names in acknowledge section alphabetical
* KD: removed RFC3762 and RFC3764 from references, as they are not
referenced in the text
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8.2. Changes since draft-ietf-enum-iax-06
* KD: Changed title from "IANA Registration for IAX Enumservice" to
"IANA Registration for Enumservice 'iax'" as the service type is in
small letters
* KD: Changed introduction (ENUM maps to URIs, not domains) - used
wording from Enumservices draft [I-D.ietf-enum-enumservices-guide].
* KD: Changed introduction: shortened IAX description - this RFC is
not about IAX but about the ENUM service.
* KD: Changed introduction: shortend description (the service field
actually does not describe the class of functionality, but is mostly
a pointer to supported communication protocols)
* KD: Use the same wording in abstract and introduction: The
Enumservice is not IAX but iax, thus used different wording.
* KD: Fixed double-spaces
* KD: IANA Registration: changed functional description: fixed
wording, use 'communication' instead of 'call origination'
* KD: IANA Registration: remove reference to URI registry (no clean
way to reference) and moved reference to [RFC5456] one paragraph up
* KD: Todo: Fix references "thisRFC" in IANA Registration
* KD: Registration with multiple priorities: write "SIP", "H323" for
the tokens, instead of "sip", "h323" and add 'mailto' to the
protocols
* KD: Examples: replaced "This contact information indicates that the
domain 9.4.1.0.6.4.9.7.0.2.4.4.e164.arpa. may be contacted" with
"This contact information indicates that +442079460149 may be
contacted" as a domain is not contacted (although the previous text
was from the ENUM RFC)
* KD: Examples: Write IPv6 address in text without [] as the port is
mentioned separately
* KD: IANA Considerations: removed the sub-type as we do not register
a sub-type
* KD: DNS Considerations: removed "Since IAX is typically deployed in
a proxy configuration" as there is no "proxy" configuration in IAX
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* KD: DNS Considerations: removed reference to [RFC4759] as IMO it
does not solve the loop problem on DNS changes and chached data (it
does not even contain the word 'loop')
* KD: Security Considerations: removed reference to RFC 4035
regarding "unwanted communication" as DNSSEC is here not relevant.
* KD: as suggested by Bernie: fixed references to RFC3761bis and
draft-ietf-enum-enumservices-guide
* KD: as suggested by Bernie: verified that all example numbers are
UK drama numbers (http://stakeholders.ofcom.org.uk/telecoms/
numbering/guidance-tele-no/numbers-for-drama) and 2001:db8::1 is a
"documentation" IPv6 address
* KD: as suggested by Bernie: replaced "Editor" with "RFC-Editor"
* KD: Acknowledgments: added Bernie
8.3. Changes since draft-ietf-enum-iax-05
* Changed to be compatible with [I-D.ietf-enum-enumservices-guide].
* Added DNS Considerations section.
* Per Dan Harkin's review, improved language in security
considerations section and fixed typo.
* Per Peter Koch's review, change DNS continuation character from \
to ( ) form.
8.4. Changes since draft-ietf-enum-iax-04
* Removed the 'iax2' subtype per AD request.
* Change from standards track to informational track.
* Added citation to second paragraph.
8.5. Changes since draft-ietf-enum-iax-03
* Removed version number '2' from scheme name.
* IDNITS: removed terminology section.
* Various rewordings per Alex Mayrhofer and idnits review.
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* Added E2U+email:mailto example to match text,
8.6. Changes since draft-ietf-enum-iax-02
* Clarifications suggested by Peter Koch.
8.7. Changes since draft-ietf-enum-iax-01
* Add reference to provisionally registered URI scheme.
* Separate normative and informative references.
* Minor grammatical edits.
* Added the IPv6 Example.
* Updated References.
8.8. Changes since draft-guy-iaxenum-00
* Minor grammatical edits.
* Added the 'iax2' subtype at WG request.
* The Examples section was split into subsections for each example.
* Context example added.
9. References
9.1. Normative References
[I-D.ietf-enum-3761bis]
Bradner, S., Conroy, L., and K. Fujiwara, "The E.164 to
Uniform Resource Identifiers (URI) Dynamic Delegation
Discovery System (DDDS) Application (ENUM)",
draft-ietf-enum-3761bis-09 (work in progress), June 2010.
[I-D.ietf-enum-enumservices-guide]
Hoeneisen, B., Mayrhofer, A., and J. Livingood, "IANA
Registration of Enumservices: Guide, Template and IANA
Considerations", draft-ietf-enum-enumservices-guide-22
(work in progress), October 2010.
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66,
RFC 3986, January 2005.
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[RFC5456] Spencer, M., Capouch, B., Guy, E., Miller, F., and K.
Shumard, "IAX: Inter-Asterisk eXchange Version 2",
RFC 5456, February 2010.
9.2. Informative References
[E164] ITU-T, "The International Public Telecommunication Number
Plan", Recommendation E.164, May 1997.
[RFC1035] Mockapetris, P., "Domain names - implementation and
specification", STD 13, RFC 1035, November 1987.
[RFC3833] Atkins, D. and R. Austein, "Threat Analysis of the Domain
Name System (DNS)", RFC 3833, August 2004.
[RFC4033] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "DNS Security Introduction and Requirements",
RFC 4033, March 2005.
[RFC4759] Stastny, R., Shockey, R., and L. Conroy, "The ENUM Dip
Indicator Parameter for the "tel" URI", RFC 4759,
December 2006.
Authors' Addresses
Ed Guy
CleverSpoke
12 Williams Road
Chatham, NJ 07928
US
Phone: +1 973 437 4519
Email: edguy@CleverSpoke.com
URI: http://www.cleverspoke.com/
Klaus Darilion
nic.at
Karlsplatz 1/2/9
1010 Wien
Austria
Phone: +43 1 5056416 36
Email: klaus.darilion@nic.at
URI: http://www.nic.at/
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