BitTorrent curiosity

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  • There are file sharing programs that don’t use UDP by default.
  • There are file sharing programs that keep up well with network limitations such as blocked UDP and fall back to TCP-only.
  • There are file sharing programs that offer TCP-only options.

Quote BitTorrent - Wireshark Wiki (not too thoroughly vetted if true):

  • TCP: Typically, BitTorrent uses TCP as its transport protocol. The well known TCP port for BitTorrent traffic is 6881-6889 (and 6969 for the tracker port). The DHT extension (peer2peer tracker) uses various UDP ports negotiated by the peers.

So while DHT may not work (perhaps not at all or not out of the box without additional configuration tweaks), torrent download using centralized torrent trackers is still possible.

See also:

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