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
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
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
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