ooniprobe – Network Interference Detection Tool

ooniOONI, the Open Observatory of Network Interference, is a global observation network which aims is to collect high quality data using open methodologies, using Free and Open Source Software (FL/OSS) to share observations and data about the various types, methods, and amounts of network tampering in the world.

“The Net interprets censorship as damage and routes around it.”
  • John Gilmore; TIME magazine (6 December 1993)

ooniprobe is the first program that users run to probe their network and to collect data for the OONI project. Are you interested in testing your network for signs of surveillance and censorship? Do you want to collect data to share with others, so that you and others may better understand your network? If so, please read this document and we hope ooniprobe will help you to gather network data that will assist you with your endeavors!

OONI develops free software tests designed to examine the following:

  • Blocking of websites
  • Blocking of instant messaging apps
  • Blocking of Tor and other circumvention tools
  • Detection of systems that could be responsible for censorship and/or surveillance

Using ooniprobe

  • Net test is a set of measurements to assess what kind of internet censorship is occurring.
  • Decks are collections of ooniprobe nettests with some associated inputs.
  • Collector is a service used to report the results of measurements.
  • Test helper is a service used by a probe for successfully performing its measurements.
  • Bouncer is a service used to discover the addresses of test helpers and collectors.


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