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URI Scheme for the Session Traversal Utilities for NAT (STUN) Protocol
RFC 7064

Document type: RFC - Proposed Standard (November 2013; No errata)
Was draft-nandakumar-rtcweb-stun-uri (individual in rai area)
Document stream: IETF
Last updated: 2013-11-22
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Yes
Document shepherd: Dan Wing
Shepherd Write-Up: Last changed 2013-09-16

IESG State: RFC 7064 (Proposed Standard)
IANA Action State: RFC-Ed-Ack
Responsible AD: Gonzalo Camarillo
Send notices to: petithug@acm.org, snandaku@cisco.com, gsalguei@cisco.com, paulej@packetizer.com, draft-nandakumar-rtcweb-stun-uri@tools.ietf.org

Internet Engineering Task Force (IETF)                     S. Nandakumar
Request for Comments: 7064                                  G. Salgueiro
Category: Standards Track                                       P. Jones
ISSN: 2070-1721                                            Cisco Systems
                                                       M. Petit-Huguenin
                                                      Impedance Mismatch
                                                           November 2013

 URI Scheme for the Session Traversal Utilities for NAT (STUN) Protocol

Abstract

   This document specifies the syntax and semantics of the Uniform
   Resource Identifier (URI) scheme for the Session Traversal Utilities
   for NAT (STUN) protocol.

Status of This Memo

   This is an Internet Standards Track document.

   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
   Internet Standards 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/rfc7064.

Copyright Notice

   Copyright (c) 2013 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.

Nandakumar, et al.           Standards Track                    [Page 1]
RFC 7064                        STUN URI                   November 2013

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Definition of the "stun" or "stuns" URI . . . . . . . . . . .   3
     3.1.  URI Scheme Syntax . . . . . . . . . . . . . . . . . . . .   3
     3.2.  URI Scheme Semantics  . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  "stun" URI Registration . . . . . . . . . . . . . . . . .   5
     5.2.  "stuns" URI Registration  . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . .   8
   Appendix B.  Design Notes . . . . . . . . . . . . . . . . . . . .   8

Nandakumar, et al.           Standards Track                    [Page 2]
RFC 7064                        STUN URI                   November 2013

1.  Introduction

   This document specifies the syntax and semantics of the Uniform
   Resource Identifier (URI) scheme for the Session Traversal Utilities
   for NAT (STUN) protocol.

   STUN is a protocol that serves as a tool for other protocols in
   dealing with Network Address Translator (NAT) traversal.  It can be
   used by an endpoint to determine the IP address and port allocated to
   it by a NAT, to perform connectivity checks between two endpoints,
   and as a keepalive protocol to maintain NAT bindings.  RFC 5389
   [RFC5389] defines the specifics of the STUN protocol.

   The "stun" and "stuns" URI schemes are used to designate a stand-
   alone STUN server or any Internet host performing the operations of a
   STUN server in the context of STUN usages (Section 14 of RFC 5389
   [RFC5389]).  With the advent of standards such as WebRTC [WEBRTC], we
   anticipate a plethora of endpoints and web applications to be able to
   identify and communicate with such a STUN server to carry out the
   STUN protocol.  This implies that endpoints and/or applications must
   be provisioned with the appropriate configuration to identify the
   STUN server. Having an inconsistent syntax adds ambiguity and can
   result in non-interoperable solutions and implementation limitations.

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