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Title : Controlling NAT Bindings using STUN
Author(s) : D. Wing, J. Rosenberg
Filename : draft-wing-behave-nat-control-stun-usage-01.txt
Pages : 21
Date : 2007-2-14
Simple Traversal Underneath NAT (STUN) is a mechanism for traversing
NATs. STUN requests are transmitted through a NAT to external STUN
servers. While this works very well, its two primary drawbacks are
the inability to modify the properties of a NAT binding and the need
to query a public STUN server for every NAT binding. These drawbacks
require frequent messages which present a load on servers (like SIP
servers and STUN servers) and are bad for low speed access networks,
such as cellular. This document proposes that the STUN server be
embedded in the NAT itself, and describes how these STUN servers can
be readily discovered and utilized to reduce queries to public STUN
servers and to reduce NAT keepalive traffic.
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