RFC - 3489

STUN - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)

Original:	ftp://ftp.isi.edu/in-notes/rfc3489.txt
Authors:	J. Rosenberg [dynamicsoft], J. Weinberger [dynamicsoft], C. Huitema [Microsoft], R. Mahy [Cisco]
Date:	March 2003
Category:	Proposed Standard

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Referred by:	16 RFC
Refers to:	16 RFC

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Status

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2003). All Rights Reserved.

Abstract

Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs) (STUN) is a lightweight protocol that allows applications to discover the presence and types of NATs and firewalls between them and the public Internet. It also provides the ability for applications to determine the public Internet Protocol (IP) addresses allocated to them by the NAT. STUN works with many existing NATs, and does not require any special behavior from them. As a result, it allows a wide variety of applications to work through existing NAT infrastructure.

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