%% You should probably cite rfc7584 instead of this I-D. @techreport{ietf-straw-b2bua-stun-03, number = {draft-ietf-straw-b2bua-stun-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-straw-b2bua-stun/03/}, author = {Ram R and Tirumaleswar Reddy.K and Gonzalo Salgueiro}, title = {{Session Traversal Utilities for NAT (STUN) Message Handling for Session Initiation Protocol (SIP) Back-to-Back User Agents (B2BUAs)}}, pagetotal = 14, year = 2015, month = mar, day = 4, abstract = {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 draft 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.}, }