Browse Prior Art Database

Session Traversal Utilities for NAT (STUN) Message Handling for SIP Back-to-Back User Agents (B2BUAs) (RFC7584) Disclosure Number: IPCOM000242385D
Original Publication Date: 2015-Jul-01
Included in the Prior Art Database: 2015-Jul-10
Document File: 28 page(s) / 33K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Ravindranath: AUTHOR [+3]


In many SIP deployments, SIP entities exist in the SIP signaling and media path between the originating and final terminating endpoints, which go beyond the definition of a traditional SIP proxy. These SIP entities, commonly known as B2BUAs, are described in [RFC7092] and often perform functions not defined in Standards Track RFCs.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 8% of the total text.

Internet Engineering Task Force (IETF)                   R. Ravindranath Request for Comments: 7584                                      T. Reddy Category: Standards Track                                   G. Salgueiro ISSN: 2070-1721                                                    Cisco                                                                July 2015

       Session Traversal Utilities for NAT (STUN) Message Handling                for SIP Back-to-Back User Agents (B2BUAs)


   Session Initiation Protocol (SIP) Back-to-Back User Agents (B2BUAs)    are often designed to be on the media path rather than just    intercepting signaling.  This means that B2BUAs often act on the    media path leading to separate media legs that the B2BUA correlates    and bridges together.  When acting on the media path, B2BUAs are    likely to receive Session Traversal Utilities for NAT (STUN) packets    as part of Interactive Connectivity Establishment (ICE) processing.

   This document defines behavior for a B2BUA performing ICE processing.    The goal of this document is to ensure that B2BUAs properly handle    SIP messages that carry ICE semantics in Session Description Protocol    (SDP) and STUN messages received as part of the ICE procedures for    NAT and Firewall traversal of multimedia sessions.

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

 Ravindranath, et al.         Standards Track                    [Page 1]
 RFC 7584               STUN Handling in SIP B2BUAs             July 2015

 Copyright Notice

   Copyright (c) 2015 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    ( 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...