[p2p-hackers] [Fwd: [Planetlab-users] Announcing: TCP NAT Traversal/Hole-Punching Library]

[Adam Fisk]

This is very much of interest -- thanks Mike!

-Adam


Michael Parker wrote:

>I just got this by way of the PlanetLab mailing list... Definitely thought it
>would be of interest!
>
>- Mike
>
>
>---------------------------- Original Message ----------------------------
>Subject: [Planetlab-users] Announcing: TCP NAT Traversal/Hole-Punching
>Library From:    "Saikat Guha" <saikat at cs.cornell.edu>
>Date:    Wed, September 28, 2005 3:46 am
>--------------------------------------------------------------------------
>
>Hi all,
>(apologies if you get multiple copies of this)
>
>I am pleased to announce the availability of our open-source TCP NAT
>Traversal/Hole-Punching library based on our research published in [1].
>
>[1] "Characterization and Measurement of TCP Traversal through NATs
>     and Firewalls", S. Guha and P. Francis. IMC 2005.
>http://nutss.net/pub/imc05-tcpnat.pdf
>
>The key result of the paper is: TCP NAT traversal can work 85%-90% of the
>time today (without any special assumptions about NATs), and 100% of the
>time between pairs of certain popular, well-behaved NATs. See [1] for more
>details.
>
>An open-source Java library for TCP NAT Traversal is now available:
> webpage: http://nutss.net/stunt.php
> faq: http://nutss.net/jstunt-faq.php
> library and example: http://nutss.net/jstunt-examples.php
>
>The above library has been tested for pair-wise connectivity across 11
>brands of NATs from Windows and Linux hosts. NATs tested were Linksys,
>DLink, Netgear, Belkin, 3Com, Netopia, Allied Telesyn, SMC, Trendnet, USR,
>Buffalo Tech. Out of the 121 possible pair-wise combinations, 113
>connections are successful. The only ones that failed are when both the
>endpoints are behind the _same_ NAT device that does not support TCP
>hairpin-behavior yet (see [1]).
>
>The java library is released under LGPL; contact me if this does not meet
>your needs. Feel free to extend it/port it etc.
>
>Q: I am a P2P developer/researcher. How does this help me?
>A: The library adds TCP NAT traversal out-of-the-box. This increases the
>connectivity in your P2P network since two users behind their NATs can now
>exchange data without having to go through an intermediary node. You can:
>- Use this library as is (for development of P2P software, research,
>  small deployments, etc in java)
>- Study it to provide TCP NAT Traversal in your existing P2P
>  applications in your language of choice.
>- etc.
>
>If you have any questions, comments, suggestions, or problems, do not
>hesitate to contact me. Cheers,
>  
>
>------------------------------------------------------------------------
>
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>
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>
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