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Versions: (draft-guy-enumiax) 00 01 02 03 04 05 06 07 08 09 10 RFC 6315

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
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   The list of Internet-Draft Shadow Directories can be accessed at
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   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
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Abstract

   This document registers the IAX Enumservice using the URI scheme
   'iax:' as per the IANA registration process defined in the ENUM



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   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


























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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
         <http://www.iana.org/assignments/uri-schemes/prov/iax> 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.



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         However, the general considerations of Section 4 apply.

      Intended Usage: COMMON

      Author: Ed Guy <edguy@emcsw.com>

      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).












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     $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'.





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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.




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   * 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.





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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/




















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