NAT Behavioral Requirements for Unicast UDP

Document Type Replaced Internet-Draft (behave WG)
Authors Francois Audet  , Cullen Jennings 
Last updated 2008-06-16 (latest revision 2004-10-18)
Replaced by RFC 4787
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
plain text htmlized pdfized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-behave-nat-udp
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines basic terminology for describing different types of behavior for NATs when handling unicast UDP. It also defines a set of requirements for NATs that would allow many applications, such as multimedia communications or online gaming, to work consistently. Developing NATs that meet this set of requirements will greatly increase the likelihood that applications will function properly.


Francois Audet (
Cullen Jennings (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)