networking - C# port forwarding -

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i'm developing simple p2p program meant work on internet, works fine on lan, when router , internet connection involved nothing gets machine. aware network question more c# question, can't have users of program set port forwarding every time want use software. have read other posts regarding this, seem old, wondering if vs2010 has way tackle this.

note: code networking complete, , uses tcplsteners , clients, can't switch other method...

thanks,

pm

is there upnp library .net (c# or vb.net)? looks promising...


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