Recover the torrent file from desktop clients (like Qbittorrent)

[deckbsd]

What version of WebTorrent?
0.98.18

What operating system and Node.js version?
windows 10 and node v8.1.3

What did you expect to happen?
With this little test code, i'm seeding a torrent file :

comm.EventEmitter.on('isTorrentExist', (exist) => {
    util.log(exist)
    if(exist === true){
        util.log("Use previous one")
        addTorrent("../poc-distribution/src/data/test.torrent")
    }
    else {
        util.log("Create a new torrent file")
        createTorrent("../poc-distribution/src/data/test.txt")
    }
})

var getClient = () => {
    var client = WebTorrent()

    window.client = client
    client.on('warning', util.warning)
    client.on('error', util.error)
}

var createTorrent = (path) => {
    window.client.seed(path, function (torrent) {
    util.log('Client is seeding ' + torrent.magnetURI)
  })
}

var addTorrent = (path) => {
    window.client.add(path, function (torrent) {
    util.log('Client is seeding ' + torrent.magnetURI)
  })
}

var createOrSeedTorrent = _ => {
    comm.isTorrentExist("../poc-distribution/src/data/test.torrent")
}

init()

function init(){
    if (!WebTorrent.WEBRTC_SUPPORT) {
        util.error('This browser is unsupported. Please use a browser with WebRTC support.')
    }

    getClient()
    createOrSeedTorrent()
}

What actually happened?
The file is corretly shared via webtorrent, i try to recover it from instant.io without any problems. The problem is, when a try to recover it from Qbitorrent for example. The client says that trackers are alive and ready, but, there is no download. I already tried with "webtorrent-hybrid", it doesn't change anything.

[feross]

WebTorrent doesn't support NAT traversal (UPnP or NAT-PMP) at this time, so the connections between WebTorrent and QBitTorrent are probably being blocked by the NAT.