Telephone Number Mapping E. Guy
Internet-Draft CleverSpoke
Intended status: Informational K. Darilion
Expires: September 29, 2011 nic.at
March 28, 2011
IANA Registration for Enumservice 'iax'
draft-ietf-enum-iax-10
Abstract
This document registers an Enumservice for the IAX protocol according
to the guidelines given in RFC 6117.
Status of this Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. IANA Registration . . . . . . . . . . . . . . . . . . . . . . . 3
3. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. Simple IAX URI . . . . . . . . . . . . . . . . . . . . . . 5
3.2. IAX URI with a context . . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
6. DNS Considerations . . . . . . . . . . . . . . . . . . . . . . 6
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6
8.1. Normative References . . . . . . . . . . . . . . . . . . . 6
8.2. Informative References . . . . . . . . . . . . . . . . . . 7
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 7
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1. Introduction
The E.164 to Uniform Resource Identifiers (URI) [RFC3986] Dynamic
Delegation Discovery System (DDDS) Application (ENUM) [RFC6116]
transforms E.164 [E164] numbers into 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 [RFC6117].
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 is used to map E.164 numbers to
IAX URIs. Such URIs identify resources capable of being
contacted to provide a communication session using the
IAX protocol .
A client selecting this NAPTR needs to be able to support
communication utilizing the IAX protocol.
See , Section 4.
COMMON
Ed Guy
CleverSpoke, Inc
mailto:edguy@CleverSpoke.com
2010-11-01
Klaus Darilion
nic.at
mailto:klaus.darilion@nic.at
2011-03-24
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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.
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.
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For security considerations that apply to all Enumservices please
refer to RFC 6116, Section 7.
5. IANA Considerations
This document requests registration of the 'iax' Enumservice
according to the guidelines and specifications in [RFC6117] 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. References
8.1. Normative References
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66,
RFC 3986, January 2005.
[RFC5456] Spencer, M., Capouch, B., Guy, E., Miller, F., and K.
Shumard, "IAX: Inter-Asterisk eXchange Version 2",
RFC 5456, February 2010.
[RFC6116] Bradner, S., Conroy, L., and K. Fujiwara, "The E.164 to
Uniform Resource Identifiers (URI) Dynamic Delegation
Discovery System (DDDS) Application (ENUM)", RFC 6116,
March 2011.
[RFC6117] Hoeneisen, B., Mayrhofer, A., and J. Livingood, "IANA
Registration of Enumservices: Guide, Template, and IANA
Considerations", RFC 6117, March 2011.
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8.2. 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.
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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