Internet Engineering Task Force (IETF) E. Guy
Request for Comments: 6315 CleverSpoke
Category: Informational K. Darilion
ISSN: 2070-1721 nic.at
July 2011
IANA Registration for Enumservice 'iax'
Abstract
This document registers an Enumservice for the Inter-Asterisk
eXchange (IAX) protocol according to the guidelines given in RFC
6117.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6315.
Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Guy & Darilion Informational [Page 1]
RFC 6315 IANA Registration for Enumservice 'iax' July 2011
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction ....................................................2
2. IANA Registration ...............................................3
3. Examples ........................................................4
3.1. Simple IAX URI .............................................4
3.2. IAX URI with a Context .....................................4
4. Security Considerations .........................................4
5. IANA Considerations .............................................5
6. DNS Considerations ..............................................5
7. Acknowledgments .................................................5
8. References ......................................................5
8.1. Normative References .......................................5
8.2. Informative References .....................................6
1. Introduction
The E.164 to Uniform Resource Identifiers (URIs) [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].
Guy & Darilion Informational [Page 2]
RFC 6315 IANA Registration for Enumservice 'iax' July 2011
2. IANA Registration
<record>
<!-- iax -->
<class>Protocol-Based</class>
<type>iax</type>
<!-- No subtype -->
<urischeme>iax</urischeme>
<functionalspec>
<paragraph>
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 <xref target="RFC5456"/>.
</paragraph>
<paragraph>
A client selecting this NAPTR needs to be able to support
communication utilizing the IAX protocol.
</paragraph>
</functionalspec>
<security>
See <xref type="rfc" data="6315"/>, Section 4.
</security>
<usage>COMMON</usage>
<registrationdocs>
<xref type="rfc" data="6315"/>
</registrationdocs>
<requesters>
<xref type="person" data="Ed_Guy"/>
<xref type="person" data="Klaus_Darilion"/>
</requesters>
</record>
<people>
<person id="Ed_Guy">
<name>Ed Guy</name>
<org>CleverSpoke, Inc</org>
<uri>mailto:edguy@CleverSpoke.com</uri>
<updated>2010-11-01</updated>
</person>
<person id="Klaus_Darilion">
<name>Klaus Darilion</name>
<org>nic.at</org>
<uri>mailto:klaus.darilion@nic.at</uri>
<updated>2011-03-24</updated>
</person>
</people>
Guy & Darilion Informational [Page 3]
RFC 6315 IANA Registration for Enumservice 'iax' July 2011
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 Naming Authority Pointer (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 5
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].
Guy & Darilion Informational [Page 4]
RFC 6315 IANA Registration for Enumservice 'iax' July 2011
The use of DNS Security (DNSSEC) [RFC4033] is recommended to improve
operational security.
For security considerations that apply to all Enumservices, please
refer to RFC 6116, Section 7.
5. IANA Considerations
This document registers 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., Ed., 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.
Guy & Darilion Informational [Page 5]
RFC 6315 IANA Registration for Enumservice 'iax' July 2011
8.2. Informative References
[E164] ITU-T, "The International Public Telecommunication
Numbering 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/
Guy & Darilion Informational [Page 6]