TURN Server Auto Discovery
draft-ietf-tram-turn-server-discovery-07

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Document Type Active Internet-Draft (tram WG)
Last updated 2016-07-13 (latest revision 2016-04-18)
Replaces draft-patil-tram-turn-serv-disc
Stream IETF
Intended RFC status Proposed Standard
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TRAM                                                            P. Patil
Internet-Draft                                                  T. Reddy
Intended status: Standards Track                                 D. Wing
Expires: October 20, 2016                                          Cisco
                                                          April 18, 2016

                       TURN Server Auto Discovery
                draft-ietf-tram-turn-server-discovery-07

Abstract

   Current Traversal Using Relays around NAT (TURN) server discovery
   mechanisms are relatively static and limited to explicit
   configuration.  These are usually under the administrative control of
   the application or TURN service provider, and not the enterprise,
   ISP, or the network in which the client is located.  Enterprises and
   ISPs wishing to provide their own TURN servers need auto discovery
   mechanisms that a TURN client could use with no or minimal
   configuration.  This document describes three such mechanisms for
   TURN server discovery.

Status of This Memo

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   This Internet-Draft will expire on October 20, 2016.

Copyright Notice

   Copyright (c) 2016 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

Patil, et al.           Expires October 20, 2016                [Page 1]
Internet-Draft            TURN server auto disc               April 2016

   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.  Discovery Procedure . . . . . . . . . . . . . . . . . . . . .   3
   4.  Discovery using Service Resolution  . . . . . . . . . . . . .   4
     4.1.  Retrieving Domain Name  . . . . . . . . . . . . . . . . .   4
       4.1.1.  DHCP  . . . . . . . . . . . . . . . . . . . . . . . .   5
       4.1.2.  From own Identity . . . . . . . . . . . . . . . . . .   5
     4.2.  Resolution  . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  DNS Service Discovery . . . . . . . . . . . . . . . . . . . .   6
     5.1.  mDNS  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Discovery using Anycast . . . . . . . . . . . . . . . . . . .   8
   7.  Deployment Considerations . . . . . . . . . . . . . . . . . .   9
     7.1.  Mobility and Changing IP addresses  . . . . . . . . . . .   9
     7.2.  Recursively Encapsulated TURN . . . . . . . . . . . . . .   9
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     8.1.  Anycast . . . . . . . . . . . . . . . . . . . . . . . . .   9
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
     9.1.  Service Resolution  . . . . . . . . . . . . . . . . . . .  10
     9.2.  DNS Service Discovery . . . . . . . . . . . . . . . . . .  11
     9.3.  Anycast . . . . . . . . . . . . . . . . . . . . . . . . .  11
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     11.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Appendix A.  Change History . . . . . . . . . . . . . . . . . . .  14
     A.1.  Change from draft-patil-tram-serv-disc-00 to -01  . . . .  14
     A.2.  Change from draft-ietf-tram-turn-server-discovery-01 to
           02  . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   TURN [RFC5766] is a protocol that is often used to improve the
   connectivity of Peer-to-Peer (P2P) applications (as defined in
   section 2.7 of [RFC5128]).  TURN allows a connection to be
   established when one or both sides are incapable of a direct P2P
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