Socket And TCP Hole Punching

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Hi I came to know about "Peer-to-Peer (P2P) Communication across Network Address Translators (NATs)". The first i have to do the method called "Hole Punching". But i have no idea how to start with code (e.g. any example or sample code to start). I am using TCP socket so i need "TCP Hole Punching" to implement.

Thanks.
~~Please help~~

Posted 4-Feb-11 18:48pm

sufi2008123

Updated 4-Feb-11 19:48pm

TweakBird

v4

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Richard MacCutchan · Answer 1 · 2011-02-04T23:58:00

Solution 1

You could always try this[^].

Posted 4-Feb-11 23:58pm

Richard MacCutchan

Comments

sufi2008123 5-Feb-11 6:50am

i already try this.
thanks.

Richard MacCutchan 5-Feb-11 7:28am

And what did you find?

AhmedZI 22-Feb-11 6:49am

Could you please tell us your results? maybe share some code too? :)

sufi2008123 22-Feb-11 10:25am

contact me sufi2008@gmail.com

Richard MacCutchan 22-Feb-11 10:29am

???

AshimD 24-Feb-11 4:18am

Please also give the UDP Punching Code because I am doing the same but is not successful Thank you

Richard MacCutchan 24-Feb-11 4:34am

See my answer to Member 4544003!

AshimD 24-Feb-11 2:35am

Please also give the UDP Punching Code
because I am doing the same but is not successful
Thank you

Richard MacCutchan 24-Feb-11 4:30am

What do you mean 'give the code'? Go and do some research for yourself and stop being so lazy!

Rod Kemp · Answer 2 · 2011-02-05T04:55:00

"Hole Punching" is a misnomer as any NAT router worthy of its name will drop or ignore any connection request that it does not know about.

So what is required is a server that exists outside of both the networks that exist behind the NAT routers, this server accepts connection requests from the clients behind the NAT routers and handles the routing of information between said clients.

Now there are exceptions where the central server notifies the "clients" and "servers" behind the NAT routers of the IP addresses of each other and a direct connection is attempted but the default connection is through a central server outside of the networks behind the NAT routers.