OONI Blog
ooni.org · Company blog · on HN since 2019
The Open Observatory of Network Interference publishes measurements and reports on internet censorship around the world, using data from volunteers.
What HN saysHN commenters recommend OONI as a tool for testing whether your network censors sites, and look to its reports on blocking.
33HN people shared it
19linked it in comments
30stories submitted
472story points
3 months agolast shared
2019people per year2026
Most-shared posts
- 1Open Observatory of Network Interference12 people · 14 points · first shared 2020 · 1 comments on HN
- 2Measuring DoT/DoH Blocking Using OONI Probe: A Preliminary Study3 people · 9 points · first shared 2022 · discussion on HN
- 3Investigating TLS Blocking in India2 people · 210 points · first shared 2020 · 128 comments on HN
- 4A Quick Look at QUIC Censorship2 people · 112 points · first shared 2022 · 53 comments on HN
- 5Russia Started Blocking Tor (2021)2 people · 19 points · first shared 2022 · 4 comments on HN
- 6New blocks emerge in Russia amid war in Ukraine2 people · 10 points · first shared 2022 · discussion on HN
- 7Countries Attempt to Block Signal Private Messenger App2 people · 8 points · first shared 2021 · 1 comments on HN
- 8Internet censorship in Russia, During first year of military conflict in Ukraine2 people · 5 points · first shared 2023 · discussion on HN
- 9Iran’s Internet blackout: Measurement data and technical observations2 people · 2 points · first shared 2019 · discussion on HN
- 10Install2 people · first shared 2020
- 11China is now blocking all language editions of Wikipedia (2019)1 people · 33 points · first shared 2020 · 6 comments on HN
- 12Zambia: Social media blocked amid 2021 general elections1 people · 23 points · first shared 2021 · 5 comments on HN
- 13A multi-perspective view of Internet censorship in Myanmar1 people · 5 points · first shared 2021 · discussion on HN
- 14Russia blocked OONI Explorer, a large open dataset on Internet censorship1 people · 5 points · first shared 2024 · discussion on HN
- 15Italy Blocks Reproductive Health Websites Women on Web and Women Help Women1 people · 3 points · first shared 2026 · discussion on HN
What HN people wrote when they linked it
sebmellen · 2020-11-18
There is a great tool called OONI (the Open Observatory of Network Interference) that you can use to test your own network and see if commonly censored sites are censored for you.
See https://ooni.org/ and https://ooni.org/install/.
utopiah · 2026-04-14
FWIW there are tools specifically to test the impact. I hope to read reports from https://ooni.org soon.
pabs3 · 2025-03-14
These folks track network censorship, you can contribute by running their stuff locally.
https://ooni.org/
ooni · 2023-01-03
The Open Observatory of Network Interference project monitors the Internet to detect censorship - https://ooni.org
We are a no-profit and network measurements are provided by volunteers.
You can browse our data regarding raw.githubusercontent.com on:
https://explorer.ooni.org/chart/mat?probe_cc=IN&test_name=web_conn…
https://explorer.ooni.org/chart/mat?probe_cc=IN&test_name=web_conn…
Sevan777 · 2022-05-06
archive.org is still blocked by 2 mobile telcos https://www.blocked.org.uk/site/http://archive.org
It was blocked by more around 2019, including by Three. Had to do the same dance to get restrictions lifted so that I could visit a library, then the rep offered me a special deal on increasing my monthly data transfer quota "for streaming videos".
Despite an "unrestricted" account, I still cannot connect to tor bridges and telegram (according to OONI tests https://ooni.org/)
throwaway_rukma · 2022-01-24
https://ooni.org reported on this previously:
https://twitter.com/OpenObservatory/status/1484228749755396097?cxt=HHw…
Trouble_007 · 2022-06-26
>Maria Xynou https://ooni.org - Fri Jun 17 12:39:52 UTC 2022
Hello Tor folks,
I'm reaching out to share the following which may be of interest:
Last year, OONI wrote a research paper, Measuring DoT/DoH Blocking Using OONI Probe: A Preliminary Study
Which was presented at the Network and Distributed System Security Symposium (NDSS'21) as part of the DNS Privacy Workshop
You can read this paper here: https://www.ndss-symposium.org/wp-content/uploads/dnspriv21-02-paper.p…
This study involves an investigation of encrypted DNS (DoT & DoH) blocking in Kazakhstan, Iran, and China with a new OONI Probe experiment (DNSCheck).
Today, we're publishing a blog post with a summary of findings (and video presentation) : https://ooni.org/post/2022-doh-dot-paper-dnsprivacy21/
You can also find a summary of findings through this Twitter thread: https://twitter.com/OpenObservatory/status/1537764247442268161
(Nitter : https://nitter.net/OpenObservatory/status/1537764247442268161 )
You can help contribute measurements on encrypted DNS blocking by running OONI Probe: https://ooni.org/install
Thanks, Maria.<
hellais · 2021-10-13
OONI | Mobile Developer | Full-time | Remote | https://ooni.org/
Are you a mobile developer interested in defending human rights on the internet? We have a job opening for you!
The OONI team (a non-profit fighting internet censorship, originally born out of the Tor Project) is looking for a dedicated mobile developer to work on OONI Probe: a free software app designed to measure internet censorship and network performance.
If you join our team, you will lead the development of the OONI Probe mobile app, supporting human rights defenders worldwide to investigate and fight internet censorship.
You will work on improving the OONI Probe mobile app and create new features to meet our global community’s needs. The Android app is currently written in Java, while the iOS app is written in Objective-C, but you are also welcome to use Kotlin or Swift.
Ideally, you would work on both the Android and iOS versions of OONI Probe. But as OONI Probe Android is run by most OONI Probe users around the world, we are primarily interested in contracting a developer with strong Android app development experience and expertise.
This is a full-time 12-month contract position, starting ASAP. The contract may be extended depending on the contractor’s performance and the availability of funds. The yearly contractor fee will range between 50,000-60,000 EUR depending on the contractor’s relevant experience and expertise.
This is a fully remote position. Even before the COVID-19 pandemic, the OONI…
ignoramous · 2020-10-23
Link: https://ooni.org/
derhuerst · 2025-07-07
to give a example: https://en.m.wikipedia.org/wiki/2019%E2%80%932021_Jammu_and_Kashmir_lo…
i'm not sure if in this case "only" the 4G network was shut off, but IMO it still serves as a good reminder of when such an event might happen again.
also: https://ooni.org/reports/
Symbiote · 2024-05-06
You can see the availability (without needing VPN etc) here.
https://ooni.org/post/2024-eu-sanctions/
634636346 · 2023-05-23
See: https://ooni.org/post/2022-quick-look-quic-censorship/
I assume Google and co. will fix this if it ever starts to seriously benefit platforms like KiwiFarms, which in the last year was being blocked by CenturyLink, a major US ISP. I also predict these QUICfixes will be met with broad enthusiasm by HNers.
RajT88 · 2022-12-30
Recently saw this with Verizon CDN and a bunch of Russian ISP's.
Most likely Roskomnadzor at work. Proving it definitively is difficult.
This site had an awesome writeup which helped:
https://ooni.org/post/2022-russia-blocks-amid-ru-ua-conflict/
(Packet trace showed a match to one of the methods listed)
gus_massa · 2022-06-25
Clicky link to the blog summary: : https://ooni.org/post/2022-doh-dot-paper-dnsprivacy21/
Does it have links to all the other versions that you posted?
Perhaps you should expand DoT and DoH in the fists lines of the text here, so it's easier to understand.
captn3m0 · 2020-09-30
Also see OONI’s post on the same topic (the same author was involved in the study): https://ooni.org/post/2020-tls-blocking-india/
References in the post above to CIS also detail some past research.
segfaultbuserr · 2020-09-29
Tor Project closely cooperates with The Open Observatory of Network Interference. OONI provides a standardized testsuit that automatically probes a wide range of websites for evaluating the censorship status in different parts of the world, and volunteers can contribute data by running an instance.
But the objective of the project is only to identify governmental and ISP-wide censorships. And its capabilities for checking protocol-level censorship techniques are rather limited [0]. Perhaps we need a similar tool or fork for probing middleboxes and censorship in private networks.
[0] https://ooni.org/nettest/
mtlynch · 2020-04-29
I don't have personal experience using it, but I believe Ooni Probe is designed for your exact use-case:
https://ooni.org/about/
bitxbitxbitcoin · 2020-04-02
People in Catalonia can give you a lot of pointers about censorship issues they've faced with the existing DNS system. [1]
[1] https://ooni.org/post/internet-censorship-catalonia-independence-refer…
input_sh · 2019-11-24
Here's a practical example: due to US sanctions, no Iranian citizen can have a Visa or a MasterCard. Assuming they've acquired cryptocurrencies somehow, it's their only way of paying for digital goods.
(assuming, of course, that the government doesn't shut down the Internet, as it did just days ago: https://ooni.org/post/2019-iran-internet-blackout/)