[bittorrent] Bittorrent upload - NAT and port forwardingsettings

Joshua Hampp joshua.hampp at gmx.de
Thu Dec 4 09:29:21 EST 2008


in general nobody (clients and tracker) knows if the ports are opened.
But as the client tries to connect to other clients which are currently not 
connected it fails or not, depending on the NAT.


>| do you mean the torrent file or the content which should be shared?
> I mean the content - the torrent file stays with the tracker I presume.
> | In the first case you do this with for example with HTTP. So
> | you can upload the file.
> | Otherwise the uploader doesn't upload to the tracker, but to
> | the other peers. Which means one of them should have an open port.
> | If your port is closed the other peer can't connect to you.
> | If the peer has an open port you can connect to him instead.
> Thanks - I appreciate that - is the negotiation done between the seed and 
> the
> client (peer?), or does the tracker keep track of whether the seeder(s) 
> have the
> appropriate ports opened or not?
> --
> Thomas
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