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The Evaluation of Different Network Address Translator (NAT) Traversal Techniques for Media Controlled by Real-time Streaming Protocol (RTSP)
draft-ietf-mmusic-rtsp-nat-evaluation-13

Document type: Active Internet-Draft (mmusic WG)
Document stream: IETF
Last updated: 2014-02-10
Intended RFC status: Informational
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication Oct 2013
Document shepherd: Flemming Andreasen
Shepherd Write-Up: Last changed 2014-02-10

IESG State: I-D Exists
Responsible AD: (None)
Send notices to: No addresses provided

Network Working Group                                      M. Westerlund
Internet-Draft                                                  Ericsson
Intended status: Informational                                   T. Zeng
Expires: August 14, 2014
                                                       February 10, 2014

 The Evaluation of Different Network Address Translator (NAT) Traversal
 Techniques for Media Controlled by Real-time Streaming Protocol (RTSP)
                draft-ietf-mmusic-rtsp-nat-evaluation-13

Abstract

   This document describes several Network Address Translator (NAT)
   traversal techniques that were considered to be used for establishing
   the RTP media flows controlled by the Real-time Streaming Protocol
   (RTSP).  Each technique includes a description of how it would be
   used, the security implications of using it and any other deployment
   considerations it has.  There are also discussions on how NAT
   traversal techniques relate to firewalls and how each technique can
   be applied in different use cases.  These findings were used when
   selecting the NAT traversal for RTSP 2.0, which is specified in a
   separate document.

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 August 14, 2014.

Copyright Notice

   Copyright (c) 2014 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

Westerlund & Zeng        Expires August 14, 2014                [Page 1]
Internet-Draft    Evaluation of NAT Traversal for RTSP     February 2014

   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Network Address Translators . . . . . . . . . . . . . . .   4
     1.2.  Firewalls . . . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Glossary  . . . . . . . . . . . . . . . . . . . . . . . .   6
   2.  Detecting the loss of NAT mappings  . . . . . . . . . . . . .   7
   3.  Requirements on Solutions . . . . . . . . . . . . . . . . . .   8
   4.  NAT Traversal Techniques  . . . . . . . . . . . . . . . . . .   9
     4.1.  Stand-Alone STUN  . . . . . . . . . . . . . . . . . . . .  10
       4.1.1.  Introduction  . . . . . . . . . . . . . . . . . . . .  10
       4.1.2.  Using STUN to traverse NAT without server
               modifications . . . . . . . . . . . . . . . . . . . .  10
       4.1.3.  ALG considerations  . . . . . . . . . . . . . . . . .  12
       4.1.4.  Deployment Considerations . . . . . . . . . . . . . .  13
       4.1.5.  Security Considerations . . . . . . . . . . . . . . .  14
     4.2.  Server Embedded STUN  . . . . . . . . . . . . . . . . . .  14
       4.2.1.  Introduction  . . . . . . . . . . . . . . . . . . . .  14
       4.2.2.  Embedding STUN in RTSP  . . . . . . . . . . . . . . .  14
       4.2.3.  Discussion On Co-located STUN Server  . . . . . . . .  16
       4.2.4.  ALG considerations  . . . . . . . . . . . . . . . . .  16
       4.2.5.  Deployment Considerations . . . . . . . . . . . . . .  16
       4.2.6.  Security Considerations . . . . . . . . . . . . . . .  17
     4.3.  ICE . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
       4.3.1.  Introduction  . . . . . . . . . . . . . . . . . . . .  17
       4.3.2.  Using ICE in RTSP . . . . . . . . . . . . . . . . . .  18
       4.3.3.  Implementation burden of ICE  . . . . . . . . . . . .  20
       4.3.4.  Deployment Considerations . . . . . . . . . . . . . .  20
       4.3.5.  Security Consideration  . . . . . . . . . . . . . . .  21
     4.4.  Latching  . . . . . . . . . . . . . . . . . . . . . . . .  21
       4.4.1.  Introduction  . . . . . . . . . . . . . . . . . . . .  21

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