STUN - Simple Traversal of UDP Through NATs

Document Type Expired Internet-Draft (individual)
Authors Jonathan Rosenberg  , Joel Weinberger  , Christian Huitema  , Rohan Mahy 
Last updated 2002-03-07
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Simple Traversal of UDP Through NATs (STUN) is a lightweight protocol that allows applications to discover the presence and types of Network Address Translators (NATs) and firewalls between them and the public Internet. It also provides the ability for applications to determine the public IP addresses allocated to them by the nat. STUN works with nearly all 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. The STUN protocol is very simple, being almost identical to echo.


Jonathan Rosenberg (
Joel Weinberger (
Christian Huitema (
Rohan Mahy (

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