Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry
RFC 6335

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Internet Engineering Task Force (IETF)                         M. Cotton
Request for Comments: 6335                                         ICANN
BCP: 165                                                       L. Eggert
Updates: 2780, 2782, 3828, 4340, 4960, 5595                        Nokia
Category: Best Current Practice                                 J. Touch
ISSN: 2070-1721                                                  USC/ISI
                                                           M. Westerlund
                                                                Ericsson
                                                             S. Cheshire
                                                                   Apple
                                                             August 2011

Internet Assigned Numbers Authority (IANA) Procedures for the Management
    of the Service Name and Transport Protocol Port Number Registry

Abstract

   This document defines the procedures that the Internet Assigned
   Numbers Authority (IANA) uses when handling assignment and other
   requests related to the Service Name and Transport Protocol Port
   Number registry.  It also discusses the rationale and principles
   behind these procedures and how they facilitate the long-term
   sustainability of the registry.

   This document updates IANA's procedures by obsoleting the previous
   UDP and TCP port assignment procedures defined in Sections 8 and 9.1
   of the IANA Allocation Guidelines, and it updates the IANA service
   name and port assignment procedures for UDP-Lite, the Datagram
   Congestion Control Protocol (DCCP), and the Stream Control
   Transmission Protocol (SCTP).  It also updates the DNS SRV
   specification to clarify what a service name is and how it is
   registered.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   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).  Further information on
   BCPs is available in 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/rfc6335.

Cotton, et al.            Best Current Practice                 [Page 1]
RFC 6335         Service Name and Port Number Procedures     August 2011

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.

Cotton, et al.            Best Current Practice                 [Page 2]
RFC 6335         Service Name and Port Number Procedures     August 2011

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Motivation . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  Background . . . . . . . . . . . . . . . . . . . . . . . . . .  6
   4.  Conventions Used in This Document  . . . . . . . . . . . . . .  8
   5.  Service Names  . . . . . . . . . . . . . . . . . . . . . . . .  8
     5.1.  Service Name Syntax  . . . . . . . . . . . . . . . . . . .  9
     5.2.  Service Name Usage in DNS SRV Records  . . . . . . . . . . 10
   6.  Port Number Ranges . . . . . . . . . . . . . . . . . . . . . . 11
     6.1.  Service Names and Port Numbers for Experimentation . . . . 12
   7.  Principles for Service Name and Transport Protocol Port
       Number Registry Management . . . . . . . . . . . . . . . . . . 12
     7.1.  Past Principles  . . . . . . . . . . . . . . . . . . . . . 13