RFC6315
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.
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.
Contents
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.
IANA Registration
<record>
<class>Protocol-Based</class>
<type>iax</type>
<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:[email protected]</uri>
<updated>2010-11-01</updated>
</person>
<person id="Klaus_Darilion">
<name>Klaus Darilion</name>
<org>nic.at</org>
<uri>mailto:[email protected]</uri>
<updated>2011-03-24</updated>
</person>
</people>
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.
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'.
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.
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 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.
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.
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.
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.
References
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.
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: [email protected] URI: http://www.cleverspoke.com/
Klaus Darilion nic.at Karlsplatz 1/2/9 1010 Wien Austria
Phone: +43 1 5056416 36 EMail: [email protected] URI: http://www.nic.at/
