Glasnost: Test if your ISP is shaping your traffic
Create your own test
Run your own server
Legal notice and imprint
Results from tests for BitTorrent traffic shaping:
We released the results from recently conducted Glasnost tests for BitTorrent traffic shaping. The results page describes how you can download the raw data and the analysis scripts we used to obtain the results. We also discuss the challenges with inferring ISP policies in the face of potential measurement errors in Glasnost results.
Glasnost featured in the New York Times:
Results from Glasnost tests were reported in New York Times.
Glasnost data used in research:
Researchers from Syracuse University used Glasnost data to create a webpage on ISPs' BitTorrent throttling.
Improved Server Selection:
Now using DONAR for server selection.
New Glasnost test:
We released a new Glasnost test that measures whether your ISP prevents you from using
Usenet servers to download binary data. You can find and run it below.
Create your own test:
You can now create your own traffic shaping test with Glasnost. Instructions can be found here.
New Glasnost tests:
We released 7 new Glasnost tests that complement our BitTorrent test. You can find and run them below.
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
Who are we?
We are researchers at the Max Planck Institute for Software Systems.
Our research focuses on characterizing residential broadband networks and understanding their
implications for the designers of future protocols and applications.
In case you have questions about this tool or our research, please visit our
network transparency project webpage or contact us via e-mail: