Session Traversal Utilities for NAT (STUN) Message Handling for SIP Back-to-Back User Agents (B2BUAs) (RFC7584)
Original Publication Date: 2015-Jul-01
Included in the Prior Art Database: 2015-Jul-10
Internet Society Requests For Comment (RFCs)
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.
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 http://www.rfc-editor.org/info/rfc7584.
Ravindranath, et al. Standards Track [Page 1]
RFC 7584 STUN Handling in SIP B2BUAs July 2015
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