The IESG has approved the following document: - 'Session Traversal Utilities for NAT (STUN) Message Handling for Session Initiation Protocol (SIP) Back-to-Back User Agents (B2BUAs)' (draft-ietf-straw-b2bua-stun-08.txt) as Proposed Standard This document is the product of the Sip Traversal Required for Applications to Work Working Group. The IESG contact persons are Ben Campbell and Alissa Cooper. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-straw-b2bua-stun/ Technical Summary 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. It is critical that B2BUAs handle these STUN messages properly. This document defines behavior for a B2BUA performing ICE processing. The goal of this document is to ensure that ICE used for NAT and Firewall traversal of multimedia sessions works when there are B2BUAs in place and the B2BUAs handle STUN messages properly. Working Group Summary The WG path of this document was reasonably short and efficient. Several technical comments were made during reviews and all were resolved with consensus. There is consensus in the STRAW WG to publish this document. Document Quality The guidelines and procedures in the document is based on input and experience from the implementer community. Personnel Document Shepherd: Victor Pascual Responsible AD: Ben Campbell
