how to detect needs of port forwarding /mapping and How to Implement it ?

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Hi everyone,

I am developing a p2p application using socket and i want to connect the remote computer behind the router.

>> Is port forwarding the only way to solve this problem ?
>> If so then how to detect dynamically needs of port forwarding /mapping ?
>> How to Implement it ?

thanks..
Please help..

Posted 2-Feb-11 18:58pm

sufi2008123

Updated 2-Feb-11 19:31pm

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jim lahey · Answer 1 · 2011-02-03T01:28:00

Solution 1

Port forwarding is the only way I know of doing this. I don't know if you can detect it dynamically. Port forwarding is accomplished by configuring your router:

http://en.wikipedia.org/wiki/Port_forwarding[^]

http://portforward.com/[^]

Posted 3-Feb-11 1:28am

jim lahey

#realJSOP · Answer 2 · 2011-02-03T01:38:00

Typically, port forwarding is handled at the firewall - NOT in your application. You can't rely on people running a software firewall, and even if they did, you can't guarantee it will be the one that your program supports. Beyond that, I would consider it a HUGE security violation - and would be downright pissed off - if an application changed my firewall settings on its own.