NAT Traversal Practices for Client-Server SIP
Chris Boulton, J. Rosenberg, Gonzalo Camarillo, Francois Audet · 2011
Traversal of the Session Initiation Protocol (SIP) and the sessions it establishes through Network Address Translators (NATs) is a complex problem.Currently, there are many deployment scenarios and traversal mechanisms for media traffic.This document provides concrete recommendations and a unified method for NAT traversal as well as documents corresponding flows.