• 05/31/10   Create your own test: You can now create your own traffic shaping test with Glasnost. Instructions can be found here.
• 04/08/10   New Glasnost tests: We released 7 new Glasnost tests that complement our BitTorrent test. You can find and run them below.
• 03/21/10   Our paper describing Glasnost's design was accepted for publication at NSDI 2010. Read the paper here.

The goal of the Glasnost project is to make ISPs' traffic shaping policies transparent to their customers. To this end, we designed Glasnost tests that enable you to check whether traffic from your applications is being rate-limited (i.e., throttled) or blocked.

Glasnost tests work by measuring and comparing the performance of different application flows between your host and our measurement servers. The tests can detect traffic shaping in both upstream and downstream directions separately. The tests can also detect whether application flows are shaped based on their port numbers or their packets' payload. For more details on how Glasnost tests work, please read our NSDI 2010 paper.

We configured our tests to be conservative when declaring the presence of shaping, i.e., passing our tests does not necessarily mean that there is no throttling occurring on your link.

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:

• 05/31/10   Create your own test: You can now create your own traffic shaping test with Glasnost. Instructions can be found here.
• 04/08/10   New Glasnost tests: We released 7 new Glasnost tests that complement our BitTorrent test. You can find and run them below.
• 03/21/10   Our paper describing Glasnost's design was accepted for publication at NSDI 2010. Read the paper here.

The goal of the Glasnost project is to make ISPs' traffic shaping policies transparent to their customers. To this end, we designed Glasnost tests that enable you to check whether traffic from your applications is being rate-limited (i.e., throttled) or blocked.

Glasnost tests work by measuring and comparing the performance of different application flows between your host and our measurement servers. The tests can detect traffic shaping in both upstream and downstream directions separately. The tests can also detect whether application flows are shaped based on their port numbers or their packets' payload. For more details on how Glasnost tests work, please read our NSDI 2010 paper.

We configured our tests to be conservative when declaring the presence of shaping, i.e., passing our tests does not necessarily mean that there is no throttling occurring on your link.

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: