Datagram Transport Layer Security (DTLS) as Transport for Session Traversal Utilities for NAT (STUN)
draft-ietf-tram-stun-dtls-02

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TRAM                                                   M. Petit-Huguenin
Internet-Draft                                       Jive Communications
Intended status: Standards Track                            G. Salgueiro
Expires: November 2, 2014                                  Cisco Systems
                                                             May 1, 2014

   Datagram Transport Layer Security (DTLS) as Transport for Session
                   Traversal Utilities for NAT (STUN)
                      draft-ietf-tram-stun-dtls-02

Abstract

   This document specifies the usage of Datagram Transport Layer
   Security (DTLS) as a transport protocol for Session Traversal
   Utilities for NAT (STUN).  It provides guidances on when and how to
   use DTLS with the currently standardized STUN Usages.  It also
   specifies modifications to the STUN URIs and TURN URIs and to the
   TURN resolution mechanism to facilitate the resolution of STUN URIs
   and TURN URIs into the IP address and port of STUN and TURN servers
   supporting DTLS as a transport protocol.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on November 2, 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Petit-Huguenin & SalgueiExpires November 2, 2014                [Page 1]
Internet-Draft               TURN over DTLS                     May 2014

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  DTLS as Transport for STUN  . . . . . . . . . . . . . . . . .   3
   4.  STUN Usages . . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  NAT Discovery Usage . . . . . . . . . . . . . . . . . . .   4
       4.1.1.  DTLS Support in STUN URIs . . . . . . . . . . . . . .   4
     4.2.  Connectivity Check Usage  . . . . . . . . . . . . . . . .   5
     4.3.  Media Keep-Alive Usage  . . . . . . . . . . . . . . . . .   5
     4.4.  SIP Keep-Alive Usage  . . . . . . . . . . . . . . . . . .   5
     4.5.  NAT Behavior Discovery Usage  . . . . . . . . . . . . . .   5
     4.6.  TURN Usage  . . . . . . . . . . . . . . . . . . . . . . .   6
       4.6.1.  DTLS Support in TURN URIs . . . . . . . . . . . . . .   6
       4.6.2.  Resolution Mechanism for TURN over DTLS . . . . . . .   6
   5.  Implementation Status . . . . . . . . . . . . . . . . . . . .   7
     5.1.  turnuri . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.2.  rfc5766-turn-server . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     7.1.  S-NAPTR application protocol tag  . . . . . . . . . . . .   9
     7.2.  Service Name and Transport Protocol Port Number . . . . .  10
       7.2.1.  The stuns Service Name  . . . . . . . . . . . . . . .  10
       7.2.2.  The turns Service Name  . . . . . . . . . . . . . . .  10
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . .  12
   Appendix B.  Release notes  . . . . . . . . . . . . . . . . . . .  13
     B.1.  Modifications between ietf-tram-stun-dtls-01 and ietf-
           tram-stun-dtls-02 . . . . . . . . . . . . . . . . . . . .  13
     B.2.  Modifications between ietf-tram-stun-dtls-00 and ietf-
           tram-stun-dtls-01 . . . . . . . . . . . . . . . . . . . .  14
     B.3.  Modifications between petithuguenin-tram-stun-dtls-00 and