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NAT Behavioral Requirements for Unicast UDP

Document Type Replaced Internet-Draft (behave WG)
Expired & archived
Authors Francois Audet , Cullen Fluffy Jennings
Last updated 2008-06-16 (Latest revision 2004-10-18)
Replaced by RFC 4787
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-behave-nat-udp
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


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 Fluffy Jennings

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