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Recommendations for Transport Port Number Uses
draft-ietf-tsvwg-port-use-05

TSVWG                                                          J. Touch
Internet Draft                                                 USC/ISI
Intended status: Best Current Practice               September 17, 2014
Expires: March 2015

              Recommendations for Transport Port Number Uses
                     draft-ietf-tsvwg-port-use-05.txt

Status of this Memo

   This Internet-Draft is submitted 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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   This Internet-Draft will expire on March 17, 2015.

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   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors. All rights reserved.

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Touch                   Expires March 17, 2015                 [Page 1]
Internet-Draft  Recommendations for Transport Port Use   September 2014

Abstract

   This document provides recommendations to application and service
   designers on how to use the transport protocol port number space. IT
   complements (but does not update) RFC6335, which focuses on IANA
   process.

Table of Contents

   1. Introduction...................................................2
   2. Conventions used in this document..............................3
   3. History........................................................3
   4. Current Port Number Use........................................4
   5. What is a Port Number?.........................................5
   6. Conservation...................................................7
      6.1. Guiding Principles........................................7
      6.2. Firewall and NAT Considerations...........................8
   7. How to Use Assigned Port Numbers...............................9
      7.1. Is a port number assignment necessary?....................9
      7.2. How Many Port Numbers?...................................11
      7.3. Picking a Port Number....................................11
      7.4. Support for Security.....................................13
      7.5. Support for Future Versions..............................14
      7.6. Transport Protocols......................................14
      7.7. When to Request an Assignment............................15
      7.8. Squatting................................................17
      7.9. Other Considerations.....................................17
   8. Security Considerations.......................................17
   9. IANA Considerations...........................................18
   10. References...................................................18
      10.1. Normative References....................................18
      10.2. Informative References..................................19
   11. Acknowledgments..............................................21

1. Introduction

   This document provides information and advice to system designers on
   the use of transport port numbers. It provides a detailed historical
   background of the evolution of transport port numbers and their
   multiple meanings. It also provides specific recommendations to
   system designers on how to use assigned port numbers. Note that this
   document provides information to potential port number applicants
   that complements the IANA process described in BCP165 [RFC6335], but
   it does not update that document.

Touch                   Expires March 17, 2015                 [Page 2]
Internet-Draft  Recommendations for Transport Port Use   September 2014

2. Conventions used in this document

[include full document text]