Up until this past month, I've had no problems downloading torrent files using uTorrent. Now, neither magnet links nor .torrentfiles can download.

Is it possible that the ISP has started blocking P2P traffic? Is there a way to detect this? (I mean finding out yourself and not asking the ISP directly. Would that even work?)

  • 1
    find out from your ISP – pratnala Nov 20 '12 at 6:45
  • 3
    Enable encryption. ISP can only block traffic they known. I will bet this is a routing problem as almost no ISP completely cuts torrent traffic. – Mikhail Nov 20 '12 at 6:52
  • 1
    See this...dpi.ischool.syr.edu/MLab-Data.html – Moab Nov 20 '12 at 15:43
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    @P thx for sharing. all your idea? – T. Webster Nov 22 '12 at 5:56
  • I also have this question. Can anyone help me by providing some new answers? The accepted answer no longer works, Switzerland requires more than one computer for its use, and Glasnost requires me to upload it to a server I control, when I want to test files and torrents hosted outside my control. – desbest Oct 13 '20 at 1:16

you can port blocking from your isp with this site:

What is my ip - Port Scanner

but you can randomize port of torrent client that cause bypass specific port blocking from isp.

  • This doesn't work anymore as network monitoring software has incorporated learning algorithms into its detection strategy.. – Gabriel Fair Sep 13 '15 at 16:57
  • The website you link to doesn't work. The test is faulty. How can port 80 and 443 fail if I can visit websites in my web browser? – desbest Oct 13 '20 at 1:10

There are 2 software's you can run to attempt discovery of ISP bittorrent throttling.

Switzerland Network Testing Tool

Glasnost: Test if your ISP is shaping your traffic

More reading

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