Telephone Number Mapping E. Guy Internet-Draft Truphone Intended status: Informational February 15, 2009 Expires: August 19, 2009 IANA Registration for IAX Enumservice draft-ietf-enum-iax-05 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on August 19, 2009. Copyright Notice Copyright (c) 2009 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. Abstract This document registers the IAX Enumservice using the URI scheme 'iax:' as per the IANA registration process defined in the ENUM Guy Expires August 19, 2009 [Page 1] Internet-Draft IANA Registration for IAX Enumservice February 2009 specification RFC3761. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Enumservice Registration - IAX . . . . . . . . . . . . . . . . 3 3. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1. Simple IAX Registration . . . . . . . . . . . . . . . . . . 4 3.2. Registration with Multiple Priorities . . . . . . . . . . . 4 3.3. Registration with an IAX context . . . . . . . . . . . . . 5 3.4. IPv6 Registration . . . . . . . . . . . . . . . . . . . . . 5 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 6 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6 7. Draft Changes . . . . . . . . . . . . . . . . . . . . . . . . . 6 7.1. Changes since draft-ietf-enum-iax-04 . . . . . . . . . . . 6 7.2. Changes since draft-ietf-enum-iax-03 . . . . . . . . . . . 6 7.3. Changes since draft-ietf-enum-iax-02 . . . . . . . . . . . 7 7.4. Changes since draft-ietf-enum-iax-01 . . . . . . . . . . . 7 7.5. Changes since draft-guy-iaxenum-00 . . . . . . . . . . . . 7 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8.1. Normative References . . . . . . . . . . . . . . . . . . . 7 8.2. Informative References . . . . . . . . . . . . . . . . . . 8 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 8 Guy Expires August 19, 2009 [Page 2] Internet-Draft IANA Registration for IAX Enumservice February 2009 1. Introduction The E.164 to Uniform Resource Identifiers (URI) [RFC3986] Dynamic Delegation Discovery System (DDDS) Application (ENUM) [RFC3761] transforms E.164 [E164] numbers into DNS names. Then, using DNS services like delegation through NS records and NAPTR records, one can look up what services are available for a specific domain name. IAX (Inter-Asterisk eXchange) [ID-IAX] is an "all in one" protocol for handling multimedia in IP networks. It combines both control and media services in the same protocol. In addition, IAX uses a single UDP data stream on a static port greatly simplifying Network Address Translation (NAT) gateway traversal, eliminating the need for other protocols to work around NAT, and simplifying network and firewall management. IAX employs a compact encoding which decreases bandwidth usage and is well suited for Internet telephony service. In addition, its open nature permits new payload types additions needed to support additional services. This document registers the IAX Enumservice according to the guidelines given in RFC3761 [RFC3761]. The IAX Enumservice is used in provisioning the services field of a NAPTR resource record. This field indicates what class of functionality a given end point offers. 2. Enumservice Registration - IAX Enumservice Name: "IAX" Enumservice Type: "iax" URI Scheme: "iax" Functional Specification: The IAX Enumservice indicates that the resource identified by the associated URI scheme is capable of being contacted using the IAX protocol to provide a communication session. A client selecting this NAPTR needs to be able to support call origination utilizing the IAX protocol [ID-IAX]. Security Considerations: There are no specific security issues with this Enumservice. Guy Expires August 19, 2009 [Page 3] Internet-Draft IANA Registration for IAX Enumservice February 2009 However, the general considerations of Section 4 apply. Intended Usage: COMMON Author: Ed Guy Any other information the author deems interesting: None. 3. Examples 3.1. Simple IAX Registration The following is an example of the use of the Enumservice registered by this document in a NAPTR resource record. $ORIGIN 8.4.1.0.6.4.9.7.0.2.4.4.e164.arpa. @ IN NAPTR 10 100 "u" "E2U+iax" \ "!^.*$!iax:example.com/chas!" . This contact information indicates that service identified by the "+442079460148" E.164 number can be accessed using the IAX protocol to domain 'example.com.' The called party, service, or program on that domain is identified by 'chas'. 3.2. Registration with Multiple Priorities The next example demonstrates that service identified by the "+441632960083" E.164 number is preferably accessed by IAX, secondly via SIP [RFC3764] , and then H.323 [RFC3762] for voice and general commmunication, and lastly by SMTP for messaging. Note that the tokens "iax", "sip", "h323", and "email" are types registered with IANA, and they have no implicit connection with the protocols or URI schemes with the same names. In each case, the next step in the resolution process is to use the resolution mechanism appropriate to each of the protocols, (specified by the URI schemes iax, sip, and h323). Guy Expires August 19, 2009 [Page 4] Internet-Draft IANA Registration for IAX Enumservice February 2009 $ORIGIN 3.8.0.0.6.9.2.3.6.1.4.4.e164.arpa. @ IN NAPTR 10 100 "u" "E2U+iax" \ "!^.*$!iax:example.com/mccarthy!" . @ IN NAPTR 10 101 "u" "E2U+SIP" \ "!^.*$!sip:mccarthy@example.com!" . @ IN NAPTR 10 102 "u" "E2U+H323" \ "!^.*$!h323:mccarthy@example.com!" . @ IN NAPTR 10 103 "u" "E2U+email:mailto" \ "!^.*$!mailto:mccarthy@example.com!" . 3.3. Registration with an IAX context The following is an example of the use of the Enumservice registered by this document in a NAPTR resource record that contains 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:example.com/joe?developers!" This contact information indicates that the domain 9.4.1.0.6.4.9.7.0.2.4.4.e164.arpa. may be contacted by using the IAX protocol at domain 'example.com' with the called party 'joe' in the context (or user partition) 'developers'. See Section Section 2 of [ID-IAX]. 3.4. IPv6 Registration The following is an example of the use of the Enumservice registered by this document in a NAPTR resource record that contains an IPV6 destination address. $ORIGIN 9.4.1.0.6.4.9.7.0.2.4.4.e164.arpa. @ IN NAPTR 10 100 "u" "E2U+iax" \ "!^.*$!iax:[2001:db8::1]:4569/alice?friends!" . This contact information indicates that the domain 9.4.1.0.6.4.9.7.0.2.4.4.e164.arpa. 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'. Guy Expires August 19, 2009 [Page 5] Internet-Draft IANA Registration for IAX Enumservice February 2009 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 another fact, visible to anyone anonymously, that may be harvested and possibly exploited. The primary result of these exploits is unwanted communications. These issues are discussed in further detail in RFC 4035 [RFC4035] and RFC 3822 [RFC3833]. The use of DNSSEC [RFC4035] is recommended to improve operational security. 5. IANA Considerations This document requests registration of the "iax" Enumservice with the 'iax' sub-type according to the guidelines and specifications in RFC 3761 [RFC3761] and the definitions in Section 2 in this document. 6. Acknowledgments This work was supported by Internet Foundation Austria. In addition, thanks to Michael Haberler and Richard Stastny for their support and guidance in writing this document. 7. Draft Changes [Note to Editor: This section is to be removed before publishing. Xml source is available upon request.] 7.1. 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. 7.2. Changes since draft-ietf-enum-iax-03 * Removed version number '2' from scheme name. * IDNITS: removed terminology section. Guy Expires August 19, 2009 [Page 6] Internet-Draft IANA Registration for IAX Enumservice February 2009 * Various rewordings per Alex Mayrhofer and idnits review. * Added E2U+email:mailto example to match text, 7.3. Changes since draft-ietf-enum-iax-02 * Clarifications suggested by Peter Koch. 7.4. 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. 7.5. 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. 8. References 8.1. Normative References [ID-IAX] Spencer, M., Capouch, B., Guy, E., Ed., Miller, F., and K. Shumard, "IAX: Inter-Asterisk eXchange Version 2", draft-guy-iax-05 Work In Progress, February 2009. [RFC3761] Faltstrom, P. and M. Mealling, "The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (DDDS) Application (ENUM)", RFC 3761, April 2004. [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, January 2005. Guy Expires August 19, 2009 [Page 7] Internet-Draft IANA Registration for IAX Enumservice February 2009 8.2. Informative References [E164] ITU-T, "The International Public Telecommunication Number Plan", Recommendation E.164, May 1997. [RFC3762] Levin, O., "Telephone Number Mapping (ENUM) Service Registration for H.323", RFC 3762, April 2004. [RFC3764] Peterson, J., "enumservice registration for Session Initiation Protocol (SIP) Addresses-of-Record", RFC 3764, April 2004. [RFC3833] Atkins, D. and R. Austein, "Threat Analysis of the Domain Name System (DNS)", RFC 3833, August 2004. [RFC4035] Arends, R., Austein, R., Larson, M., Massey, D., and S. Rose, "Protocol Modifications for the DNS Security Extensions", RFC 4035, March 2005. Author's Address Ed Guy Truphone 12 Williams Rd Chatham, NJ 07928 US Phone: +1 973 437 4519 Email: edguy@emcsw.com URI: http://www.TruPhone.com/ Guy Expires August 19, 2009 [Page 8]