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Glasnost: Test if your ISP is manipulating BitTorrent traffic

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NEW!

Glasnost creates a BitTorrent-like transfer between your machine and our server, and determines whether or not your ISP is limiting such traffic. This is a first step towards making traffic manipulation by ISPs more transparent to their customers.

We designed our online tool to detect whether your ISP is using one of the following techniques:

Note that some ISPs do not throttle all BitTorrent traffic but only if this traffic exceeds a certain threshold. Thus, passing our tests does not necessary mean that there is no throttling occurring on your link.


  • Our test runs BitTorrent and TCP downloads as well as uploads on a well-known BitTorrent port and a non-BitTorrent port.
  • If you are interested in a more detailed description of our test suite and its detection techniques, please read on here.
  • Note to all users: To allow accurate measurements you should stop any large downloads that might run in the background.

We are sorry. Our measurement servers are currently overloaded and cannot serve you at the moment. Please try again later.

The Glasnost BitTorrent test takes approximately 8 minutes.

M-Lab Glasnost makes use of the Measurement Lab (M-Lab) research platform.
To learn what information our tool collects, please go here.

In case you have questions about this tool or our research, please visit our network transparency project webpage or contact us via e-mail: broadband @at@ mpi-sws mpg de