Users
We estimate the number of users by analyzing the requests induced by clients to relays and bridges.
This graph shows the estimated number of directly-connecting clients; that is, it excludes clients connecting via bridges. These estimates are derived from the number of directory requests counted on directory authorities and mirrors. Relays resolve client IP addresses to country codes, so that graphs are available for most countries. Furthermore, it is possible to display indications of censorship events as obtained from an anomaly-based censorship-detection system (for more details, see this technical report). For further details check the documentation on Reproducible Metrics.
Related events
The following events have been manually collected in the metrics-timeline Git repository and might be related to the displayed graph.
| Dates | Places/Protocols | Description and Links |
|---|---|---|
| 2026-03-09 | snowflake |
Update snowflake-01 bridge to tor 0.4.9.5
|
| 2026-03-05 | snowflake |
Update snowflake-02 bridge to tor 0.4.9.5 for a metrics issue.
issue issue |
| 2026-02-28 to present | Iran |
Internet shutdown in Iran.
comment BBS thread |
| 2026-02-10 | snowflake |
Update snowflake-01 bridge to tor 0.4.8.22 for a metrics issue.
issue |
| 2026-01-28 |
Release of tor 0.4.8.22. Includes a change to count consensus downloads only after they have completed. Before this, incomplete consensus downloads (such as could be caused by the blocking of Tor) would inflate apparent user count statistics.
announcement release notes issue |
|
| 2026-01-13 to 2026-01-17 | Uganda |
Internet shutdown in Uganda during general election.
issue OONI findings |
| 2026-01-08 to 2026-01-27 | Iran |
Internet shutdown in Iran.
issue BBS thread IODA graph |
| 2025-12-21 | snowflake |
Planned maintenance on the snowflake-01 server for verification of boot media \#3.
issue |
| 2025-12-21 | snowflake |
Planned maintenance on the snowflake-01 server for verification of boot media \#2.
issue |
| 2025-12-12 | snowflake |
Planned maintenance on the snowflake-01 server for verification of boot media \#1.
issue |
| 2025-12-12 | snowflake |
Planned maintenance on the snowflake-01 server for failing disk (again).
issue |
| 2025-11-21 | snowflake |
Planned maintenance on the snowflake-01 server for failing disk.
issue |
| 2025-09-20 to 2025-09-21 | Bridges snowflake website |
DNSSEC outage preventing resolution of torproject.org and torproject.net domains. This affects snowflake as well as the Tor Project website and some bridge distribution channels.
issue |
| 2025-08-20 | snowflake |
The Snowflake broker starts zeroing out the count of daily unique proxy IP addresses. Before this, only *new* proxy IP addresses (new since the last broker restart) had contributed to the count each day.
issue |
| 2025-08-20 | snowflake |
The Snowflake broker starts doing client IP address geolocation for ampcache rendezvous.
issue |
| 2025-08-02 to 2025-08-13 | snowflake |
Outage of the snowflake-02 bridge, caused by a hardware failure.
issue |
| 2025-06-26 to 2025-07-04 | Togo obfs4 vanilla |
Partial blocking of Tor directory authorities and default obfs4 bridges in Togo during protests.
issue |
| 2025-06-18 to 2025-06-21 | Iran |
Network shutdown in Iran.
effects on Snowflake BBS thread NTC thread |
| 2025-06-10 | conjure meek moat snowflake |
Temporary outage of CDN77 domain fronting.
issue |
| 2025-06-05 | Belarus webtunnel |
Removed WebTunnel from Connection Assist in Belarus.
merge request |
| 2025-06-05 | China webtunnel |
WebTunnel becomes the primary transport in Connection Assist in China.
merge request |
| 2025-06-05 | Myanmar webtunnel |
WebTunnel becomes the primary transport in Connection Assist in Myanmar.
merge request |
| 2025-06-05 | Turkmenistan meek obfs4 snowflake |
Snowflake becomes the primary transport in Connection Assist in Turkmenistan.
merge request fix commit |
| 2025-04-28 | Turkmenistan snowflake Unknown |
Sustained large increase in bridge users from Turkmenistan, especially Snowflake, from near zero to over 5,000.
comment bridge users graph anti-censorship team meeting discussion April 2025 Snowflake Daily Operations update |
| 2025-01-25 | Belarus |
Presidential election in Belarus.
relay graph bridge graph |
| 2024-12-16 to 2024-12-20 | snowflake |
The snowflake-broker.azureedge.net CDN configuration is non-functional, as part of the transition to a new broker.
comment graph |
| 2024-11-25 | Russia snowflake |
Migration of the Snowflake broker to a new host at a different IP address. Standalone proxies erroneously continue to poll the old broker. NAT behavior self-testing is briefly disrupted.
issue DNS change issue tor-relays post |
| 2024-11-06 to 2024-11-21 | Russia snowflake |
Blocking of Snowflake DTLS connections in Russia.
issue BBS thread NTC thread |
| 2024-09-30 | snowflake |
Redeployed the Snowflake probetest with another fix to NAT type testing, aimed at reducing the number of instances of "restricted".
issue |
| 2024-09-18 | Bridges |
Bridge distribution transitions from BridgeDB to rdsys.
comment mailing list post |
| 2024-09-10 | snowflake |
Redeployed the Snowflake probetest with fixes to NAT type testing, aimed at reducing the number of instances of "unknown".
issue |
| 2024-08-22 to 2024-08-23 | snowflake |
Outage of the Snowflake broker.
issue |
| 2024-06-18 | snowflake |
Release of version 0.8.3 of the Snowflake proxy WebExtension, hoped to restore proxy capacity with its fixed consent prompt.
comment graph |
| 2024-06-10 | Bridges |
The bridge authority upgrades to tor version 0.4.8.12 and begins rejecting bridges running version 0.4.7.
mailing list post |
| 2024-06-09 to 2024-06-13 | Algeria |
Shutdowns during university exams in Algeria.
issue blog post |
| 2024-05-30 to present | Myanmar |
Blocking of VPNs in Myanmar. Bridge users increase.
issue |
| 2024-05-14 to present |
High load leading to network performance issues.
status.torproject.org forum post |
|
| 2024-05-11 | snowflake |
Loss of about 60,000 WebExtension Snowflake proxies, after the release of version 0.8.2 of the proxy WebExtension, the first release available for Chrome adding a consent prompt that existing users didn't notice.
issue |
| 2024-05-02 |
Release of Orbot for Android 17.2.1-RC-2-tor-0.4.8.7, the first release of Orbot 17 to appear on the Google Play Store. Orbot Snowflake proxies (kindness mode) increase.
release graph of Snowflake proxies |
|
| 2024-04-08 | snowflake |
Loss of about 15,000 WebExtension Snowflake proxies, after the release of version 0.8.0 of the proxy WebExtension, which adds a consent prompt that existing users didn't notice. Version 0.8.0 was released only for Firefox, not for Chrome.
issue |
| 2024-03-29 to 2024-04-24 | snowflake Unknown |
Temporary reductions in users of the snowflake-01 bridge, with simultaneous increases in users of the snowflake-02 bridge.
issue forum post |
| 2024-03-16 to 2024-04-08 | snowflake |
Version 0.7.3 of the Snowflake WebExtension is removed from the Firefox Add-ons store because of a policy change. Version 0.8.0 adds a consent prompt and is re-added to the store.
issue |
| 2024-03-15 | snowflake Unknown |
The Snowflake bridges suddenly recover a large amount of bandwidth, two weeks after the Fastly domain fronting change of 2023-03-01.
mailing list post |
| 2024-03-06 | moat snowflake |
Release of Tor Browser 13.0.11, with workaround for the domain fronting change of 2024-03-01.
blog post Snowflake merge request Moat merge request |
| 2024-03-01 | moat snowflake |
Fastly stops supporting domain fronting. This affects Snowflake, Moat, and Connection Assist.
issue pre-announcement in November 2023 forum post bandwidth graphs |
| 2024-02-17 | snowflake |
Restart of snowflake-01 bridge for system upgrade
comment |
| 2024-02-17 | snowflake |
Restart of snowflake-01 bridge in preparation for upgrades
comment |
| 2024-02-09 |
Release of Orbot for Android 17.2.1-RC-1-tor-0.4.8.7.
release |
|
| 2024-02-08 to present | Pakistan |
Shutdowns on mobile ISPs in Pakistan on Election Day.
Cloudflare Radar tweet |
| 2024-02-04 to 2024-02-07 | Senegal |
Shutdown of mobile services in Senegal during protests.
article |
| 2024-01-31 to 2024-02-02 | Russia OR |
Plain Tor is temporarily unblocked in Russia.
NTC thread OONI chart |
| 2024-01-22 | snowflake |
Restart of snowflake-01 bridge for configuration and kernel updates
comment |
| 2023-12-21 | Bridges |
Release of Tor Browser 13.0.8. Fixes the problem of pluggable transports not running on Windows 7 and Windows 8, except for Snowflake.
blog post issue merge request |
| 2023-12-19 | Bridges |
Release of Tor Browser 13.0.7. Pluggable transports don't work with Windows 7 and Windows 8.
blog post issue |
| 2023-12-17 | snowflake |
Restart of snowflake-01 bridge for test of configuration changes
|
| 2023-12-15 | snowflake |
Upgraded tor from 0.4.8.8 to 0.4.8.10 on the snowflake-01 bridge. Fixes the bug that made user counts by country more imprecise.
comment graph monthly update |
| 2023-12-15 | snowflake |
Upgraded tor from 0.4.8.8 to 0.4.8.10 on the snowflake-02 bridge. Fixes the bug that made user counts by country more imprecise.
comment |
| 2023-12-08 |
Release of tor 0.4.8.10. Fixes TROVE-2023-007 affecting exit relays with Conflux. Fixes the bug that caused incorrect counting of pluggable transport users.
announcement |
|
| 2023-11-21 | snowflake |
Restarted the snowflake-02 bridge for a performance enhancement.
comment |
| 2023-11-21 | snowflake |
Restarted the snowflake-01 bridge for a performance enhancement.
comment |
| 2023-11-16 | Relays |
Removal of about 1,000 "ATOR" relays.
blog post blog post graph |
| 2023-11-07 | snowflake |
Restarted the snowflake-02 bridge for a performance enhancement. Upgraded tor from 0.4.8.6 to 0.4.8.8.
comment |
| 2023-10-20 | snowflake |
Restart of snowflake-01 bridge for Debian 11.8 upgrade. Upgraded tor from 0.4.8.6 to 0.4.8.7.
comment |
| 2023-10-12 |
Release of Tor Browser 13.0. First stable release with Conflux.
blog post tor-relays post |
|
| 2023-10-05 | snowflake |
Release of Orbot 17.1.0-RC-2-tor.0.4.7.14, again changing the domain front to attempt to work around Snowflake connection problems.
release commit |
| 2023-10-04 | snowflake Unknown |
The snowflake-02 bridge suddenly recovers a large amount of bandwidth, after two weeks of low usage following the domain front change of 2023-09-20.
mailing list post |
| 2023-10-03 | snowflake |
Upgraded tor from 0.4.7.13 to 0.4.8.6 on the snowflake-01 bridge. As with the upgrade on snowflake-02 on 2023-09-24, this causes the reporting of spurious OR protocol users.
comment mailing list post comment monthly update |
| 2023-09-28 | snowflake |
Release of Orbot 17.1.0-RC-1-tor.0.4.7.14, with an alternative domain front to attempt to work around Snowflake connection problems.
release commit |
| 2023-09-26 | snowflake |
Release of Tor Browser 12.5.5, with an alternative domain front to attempt to work around Snowflake connection problems.
blog post merge request |
| 2023-09-24 | snowflake |
Upgraded tor from 0.4.7.13 to 0.4.8.6 on the snowflake-02 bridge. As the result of an apparent bug, the bridge starts reporting a number of OR protocol users about equal to the number of Snowflake users.
mailing list post about upgrade mailing list post about metrics problems core Tor issue metrics issue |
| 2023-09-24 | snowflake |
Release of Tor Browser 13.0a5, with an alternative domain front to attempt to work around Snowflake connection problems.
blog post merge request |
| 2023-09-21 | snowflake Unknown |
The snowflake-01 bridge suddenly recovers a large amount of bandwidth, about 24 hours after the domain front change of 2023-09-20 started to lower the number of users.
mailing list post |
| 2023-09-20 | moat snowflake |
The front domain used by Snowflake, Moat, and Connection Assist starts sometimes resolving to a different CDN, which makes these services stop working for some users. The snowflake-01 bridge drops to about half its normal number of users; the snowflake-02 bridge drops almost to zero. There would later be sudden partial recoveries of usage on snowflake-01 at 2023-09-21 13:10:00 and snowflake-02 at 2023-10-04 11:40:00.
forum post about Snowflake forum post about Moat and Connection Assist |
| 2023-09-19 to 2023-10-31 | Azerbaijan |
Blocking of TikTok in Azerbaijan.
tweet about start tweet about end |
| 2023-09-19 to 2023-09-25 | Azerbaijan |
Blocking of Google Play Store in Azerbaijan.
tweet |
| 2023-09-04 to 2023-09-09 | United States Relays Unknown |
Unexplained spike in relay users from the US.
issue |
| 2023-08-27 to 2023-08-30 | snowflake |
Outage of the snowflake-02 bridge caused by a temporary network disconnection at the network host. Client polls at the broker increase and traffic is diverted to snowflake-01.
mailing list post article status page |
| 2023-08-23 to 2023-12-08 | Bridges |
A bug in tor 0.4.8.4 causes misattribution of about half of pluggable transport users to the plain Tor protocol in bridges that upgrade to this version. The bug is fixed in tor 0.4.8.10.
issue issue merge request |
| 2023-08-23 |
Release of tor 0.4.8.4, with new Conflux and anti-DoS proof-of-work features.
announcement |
|
| 2023-08-08 to present | Jordan |
Blocking of Grindr in Jordan.
OONI report |
| 2023-08-05 to present | Iraq |
Blocking of Telegram in Iraq.
Kentik report |
| 2023-08-03 | Turkmenistan meek snowflake |
Make meek the first choice in Connection Assist for Turkmenistan, and changed the meek front domain.
merge request |
| 2023-07-18 | Turkmenistan OR |
Blocking of the default Tor client TLS fingerprint in the AGTS ISP in Turkmenistan.
comment relay users graph |
| 2023-07-18 | snowflake |
Restarted snowflake-server on the snowflake-02 bridge with num-turbotunnel=8.
comment |
| 2023-07-18 | snowflake |
Restarted snowflake-server on the snowflake-01 bridge with num-turbotunnel=8.
comment |
| 2023-07-18 | snowflake |
Restarted snowflake-server on the snowflake-01 bridge with num-turbotunnel=1.
comment |
| 2023-07-01 | snowflake |
Restarted snowflake-01 bridge after testing performance optimizations.
comment |
| 2023-06-30 |
The number of allowed relays per IP address (AuthDirMaxServersPerAddr) is increased from 2 to 8.
announcement issue |
|
| 2023-06-29 | snowflake |
Restarted snowflake-01 bridge to test an optimization.
comment |
| 2023-06-29 | snowflake |
Restarted snowflake-01 bridge to test an optimization.
comment |
| 2023-06-29 | webtunnel |
Announcement of WebTunnel availability.
announcement |
| 2023-06-29 | snowflake |
Restarted snowflake-01 bridge to test an optimization.
comment |
| 2023-06-28 | snowflake |
Restarted snowflake-01 bridge for a profiling change.
comment |
| 2023-06-12 to 2024-05-06 | Germany Relays Unknown |
Increase in relay users from Germany.
issue graph forum thread |
| 2023-06-05 to 2023-06-07 | Senegal |
Blocking of mobile Internet in Senegal.
article |
| 2023-06-01 | conjure |
Announcement of Conjure availability.
announcement BBS thread |
| 2023-06-01 to present | Senegal |
Blocking of social media in Senegal.
article OONI report |
| 2023-05-31 | snowflake |
Release of Orbot 17.1.0-BETA-2-tor.0.4.7.11.
release |
| 2023-05-22 | snowflake |
Restarted the snowflake-01 bridge for an upgrade.
comment |
| 2023-05-21 | snowflake |
Restarted the snowflake-02 bridge for an upgrade.
comment |
| 2023-05-12 to 2023-05-14 | China snowflake |
Block of Snowflake default front domain in China.
issue BBS thread forum thread |
| 2023-04-26 to present | Brazil |
Block of Telegram in Brazil.
OONI report |
| 2023-04-23 to 2023-04-25 | Sudan |
Internet outage in Sudan.
liveblog Wikipedia |
| 2023-04-19 | China obfs4 snowflake |
Changed the recommended transport in Connection Assist in China from obfs4 to snowflake.
comment commit |
| 2023-04-12 | snowflake |
Orbot begins a release rollout of version 17.0.0-RC-1-tor.0.4.7.11. First release of Orbot to include the snowflake-02 bridge along with the existing snowflake-01. Has a change to the Snowflake DTLS fingerprint (removes Hello Verify Request) to mitigate reported blocking in Russia.
release Orbot commit adding snowflake-02 IPtProxy commit upgrading Snowflake |
| 2023-04-11 | snowflake |
Release of Snowflake WebExtension 0.7.2, with a fix for missing client country information that had been introduced in 0.6.0 on 2022-06-27. The result is better country-level attribution of Snowflake users: most who had been being assigned to ?? are now assigned to their proper geolocated country.
archive comment |
| 2023-04-11 | China obfs4 Unknown |
Sudden drop in access to bridges from the "settings" and "moat" pools from China.
comment bridge graph |
| 2023-04-08 | snowflake |
Deployed a performance optimization on the snowflake-01 bridge.
comment |
| 2023-04-07 | snowflake |
Deployed a performance optimization on the snowflake-02 bridge.
comment |
| 2023-03-31 to 2023-04-18 | webstats Unknown |
Tor Browser update pings temporarily drop further.
graph issue |
| 2023-03-22 | snowflake |
Rebooted the snowflake-02 bridge to make nf_conntrack changes persistent.
comment |
| 2023-03-22 | webtunnel |
Release of Tor Browser 12.5a4, first release with WebTunnel for mobile.
blog post issue |
| 2023-03-22 | snowflake |
Rebooted the snowflake-01 bridge to make nf_conntrack changes persistent.
comment |
| 2023-03-19 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-03-15 | snowflake |
Release of Orbot for Android v17 BETA 2. First release of Orbot to include the snowflake-02 bridge along with the existing snowflake-01. Has a change to the Snowflake DTLS fingerprint (removes Hello Verify Request) to mitigate reported blocking in Russia.
release Orbot commit adding snowflake-02 IPtProxy commit upgrading Snowflake |
| 2023-03-13 | snowflake |
Restarted snowflake-01 bridge for a bugfix.
comment issue |
| 2023-03-13 | snowflake |
Restarted snowflake-02 bridge for a bugfix.
comment issue |
| 2023-03-13 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-03-10 to 2023-03-13 | snowflake |
Temporarily restarted snowflake-server on the snowflake-02 bridge to activate the Go race detector.
comment |
| 2023-03-10 | United Arab Emirates obfs4 snowflake |
Removed Connection Assist settings for the United Arab Emirates.
merge request |
| 2023-03-08 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-03-06 | snowflake |
Re-increased firewall connection tracking limits on the snowflake-01 and snowflake-02 bridges, which had been unintentionally reduced to the defaults since 2023-02-16.
comment |
| 2023-03-03 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-02-22 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-02-20 | conjure |
Release of Tor Browser 12.5a3, first release with Conjure.
blog post issue |
| 2023-02-19 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-02-17 | snowflake |
Restarted snowflake-01 bridge for HAProxy security update.
comment |
| 2023-02-16 | snowflake |
Increased the number of tor instances on the snowflake-02 bridge from 4 to 12.
issue |
| 2023-02-16 | snowflake |
Restarted snowflake-02 bridge for HAProxy security update.
comment |
| 2023-02-15 | snowflake |
Release of Tor Browser 12.0.3. Has a change to the Snowflake DTLS fingerprint (removes Hello Verify Request) to mitigate reported blocking in Russia.
blog post comment about Hello Verify Request Snowflake merge request Tor Browser merge request |
| 2023-02-10 to 2023-02-13 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment OONI chart |
| 2023-02-09 to present | Ethiopia |
Social media blocking in Ethiopia.
relay graph bridge graph BBS thread |
| 2023-02-01 to present | Senegal |
Blocking of TikTok in Senegal.
tweet |
| 2023-01-31 to 2023-02-01 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is again blocked in some ISPs in Iran.
comment |
| 2023-01-20 to present | webstats Unknown |
Tor Browser update pings drop temporarily. A similar effect is present in other years.
graph issue |
| 2023-01-19 | Iran |
Shutdown in some ISPs in Iran during student exams.
Cloudflare Radar |
| 2023-01-16 to 2023-01-24 | Iran moat snowflake |
The domain name cdn.sstatic.net, which is used by Snowflake and Moat, is blocked in some ISPs in Iran.
comment |
| 2023-01-12 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Thu, 12 Jan 2023 05:25:41 GMT" (geoip-db-digest D48EC82E3F03A0C929B6D85FBA12D538524AC9B1, geoip6-db-digest BB4E522D86A3C1FB6E820A69F4AA16DAC953B05B).
commit |
| 2023-01-12 | snowflake |
Restarted snowflake-server on the snowflake-01 bridge with num-turbotunnel=4.
issue |
| 2023-01-05 | China obfs4 Unknown |
Sudden drop in access to bridges from the "email" pool from China.
comment bridge graph |
| 2022-12-21 | webtunnel |
Release of Tor Browser 12.5a1, first release with WebTunnel for desktop.
blog post merge request |
| 2022-12-20 | snowflake |
Increased firewall connection tracking limits on the snowflake-02 bridge.
issue |
| 2022-12-15 | Russia obfs4 snowflake |
Made obfs4 preferred over Snowflake in Connection Assist for Russia.
merge request |
| 2022-12-13 | snowflake |
Increased firewall connection tracking limits on the snowflake-01 bridge.
comment |
| 2022-12-07 | snowflake |
Release of Tor Browser 12.0, the first stable release to contain both the snowflake-01 and snowflake-02 bridges.
issue blog post BBS comment NTC comment |
| 2022-12-06 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Thu, 10 Nov 2022 06:23:12 GMT" (geoip-db-digest A5C34FC3C709B524ADE33779FFD75C64D1F5003D, geoip6-db-digest 10AAC07E3C77361DF777A0DC1EA956997CB8D439).
commit |
| 2022-12-06 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Sun, 04 Dec 2022 05:55:29 GMT" (geoip-db-digest 7F3C80C728C56ABA89C3E56279BECFD39314DD97, geoip6-db-digest FD15242DA08323FC66363B431359313374633FDC).
commit |
| 2022-12-01 | snowflake |
Release of Tor Browser 12.0a5, the first release to contain both the snowflake-01 and snowflake-02 bridges.
issue announcement BBS comment |
| 2022-11-18 | Russia meek |
Reported blocking of the meek-azure front domain in Russia.
NTC post |
| 2022-11-15 | United Arab Emirates obfs4 snowflake |
Added obfs4 and Snowflake settings to Connection Assist for the United Arab Emirates.
merge request |
| 2022-11-10 |
Release of tor 0.4.7.11, with mitigations against network denial of service.
announcement |
|
| 2022-11-01 | Iran snowflake |
Orbot begins a gradual release rollout of version 16.6.3-RC-1-tor.0.4.7.10, which has TLS fingerprint changes to make Snowflake work in Iran again.
release |
| 2022-10-27 | snowflake |
Release of Tor Browser 11.5.6. Fixes the problem that prevented Snowflake from working in 11.5.5, and enables uTLS TLS camouflage support by default for Snowflake.
blog post issue |
| 2022-10-26 | snowflake |
Distributed snowflake-01 outgoing traffic over five IP addresses, in an attempt to mitigate anti-DDoS false detections by other relays.
comment |
| 2022-10-26 | snowflake |
Reboot of the snowflake-01 bridge for software updates.
|
| 2022-10-25 | meek snowflake |
Release of Tor Browser 11.5.5. Adds a new working default meek bridge. Intended to enable uTLS TLS camouflage support by default for Snowflake, but had a bug that prevented Snowflake from working.
blog post issue |
| 2022-10-20 | snowflake |
Release of Orbot for Android 16.6.3-BETA-2-tor.0.4.7.10. Adds uTLS TLS camouflage support for Snowflake, making it possible to circumvent recent TLS blocking in Iran.
release announcement |
| 2022-10-19 | snowflake |
Reboot of the snowflake-01 bridge for software updates.
|
| 2022-10-17 | Iran snowflake |
Changed the uTLS fingerprint from hellochrome_auto to hellorandomizedalpn for Snowflake in Iran in Connection Assist, and reverted an inadvertent broker domain front change.
comment |
| 2022-10-17 | Iran snowflake |
Enabled uTLS for Snowflake in Iran in Connection Assist, using the hellochrome_auto fingerprint.
comment merge request |
| 2022-10-17 to 2022-10-25 | snowflake |
Temporary experiment with reverting the 2022-10-03 Snowflake broker change to require multi-bridge support in proxies.
comment for beginning comment for end meeting notes meeting log |
| 2022-10-17 | China Hong Kong obfs4 snowflake |
Changed the recommended transport in Connection Assist to obfs4 in China (was snowflake) and Hong Kong (was unspecified).
issue merge request meeting notes |
| 2022-10-12 | snowflake |
Release of Tor Browser 11.5.4. Adds uTLS TLS camouflage support for Snowflake, making a manual configuration possible to circumvent recent TLS blocking in Iran.
blog post BBS comment |
| 2022-10-05 to 2022-12-05 | meek |
The default meek-azure bridge meek has a configuration issue and the metrics website cannot process statistics.
issue |
| 2022-10-04 | snowflake |
Snowflake rendezvous blocked by TLS fingerprint in Iran.
issue BBS thread |
| 2022-10-04 | meek |
The default meek-azure bridge cymrubridge02 goes offline.
issue |
| 2022-10-03 | snowflake |
Outage of the snowflake-01 bridge caused by a change in firewall rules.
comment |
| 2022-10-03 | snowflake |
Deployment of Snowflake broker to reject proxies that do not support multiple bridges.
issue issue |
| 2022-10-02 | snowflake |
Mitigation of ephemeral port exhaustion on the snowflake-01 bridge.
comment |
| 2022-10-02 | snowflake |
Partial mitigation of ephemeral port exhaustion on the snowflake-01 bridge.
comment |
| 2022-10-02 | snowflake |
Attempted mitigation of ephemeral port exhaustion on the snowflake-01 bridge.
comment |
| 2022-10-02 | snowflake |
Attempted mitigation of ephemeral port exhaustion on the snowflake-01 bridge.
comment |
| 2022-10-02 | snowflake |
Restart of snowflake-server on the snowflake-01 bridge, multiple KCP instances.
comment |
| 2022-10-01 | snowflake |
Restart of snowflake-server on the snowflake-01 bridge, with a reduction in memory use for downstream writes.
comment |
| 2022-10-01 | snowflake |
Restart of snowflake-server on the snowflake-01 bridge, with GOGC=200.
comment |
| 2022-09-30 to 2022-10-01 | snowflake |
Experiment with bypassing extor-static-cookie on the snowflake-01 bridge. Transport- and country-specific metrics were not collected on the bridge during this time.
issue |
| 2022-09-30 | snowflake |
Restart of snowflake-server on the snowflake-01 bridge with a mitigation for ephemeral port exhaustion.
comment |
| 2022-09-30 | snowflake |
Restart of snowflake-server on the snowflake-01 bridge to restore a dual-stack configuration.
comment |
| 2022-09-30 | snowflake |
Temporary outage of the snowflake-01 bridge caused by adjusting network interfaces.
comment |
| 2022-09-29 | snowflake |
Reboot of snowflake-01 bridge and restarts of the snowflake-server process for maintenance.
comment |
| 2022-09-29 to 2022-10-31 |
When Tor Metrics introduced a new method of counting clients (to work with multi-instance relays like the Snowflake bridge), it required reprocessing stats in the overlapping months.
issue |
|
| 2022-09-29 | snowflake |
Redeployed snowflake-server on the snowflake-01 bridge, in an attempt to reduce memory allocation.
comment commit |
| 2022-09-28 | snowflake |
Testing an alternative WebSocket package on the snowflake-01 bridge.
comment |
| 2022-09-27 |
Tor Metrics gains the ability to process descriptors from multi-instance relays (like the Snowflake bridge).
merge request issue |
|
| 2022-09-27 | snowflake |
Redeployed snowflake-server on the snowflake-01 bridge, reducing the per-client packet send queue size from 2048 to 512.
comment |
| 2022-09-26 | snowflake |
RAM upgrade on snowflake-01 bridge.
issue |
| 2022-09-26 | ir obfs4 snowflake |
Made Snowflake the preferred transport in Connection Assist for Iran (was obfs4).
merge request |
| 2022-09-24 | snowflake |
Increased the number of tor instances on the snowflake-01 bridge from 8 to 12.
comment mailing list post |
| 2022-09-24 | snowflake |
Redeployed snowflake-server on the snowflake-01 bridge, with further memory use optimizations.
comment |
| 2022-09-23 | snowflake |
Redeployed snowflake-server on the snowflake-01 bridge, reducing the keepalive timeout from 10 minutes to 4 minutes.
comment |
| 2022-09-23 | snowflake |
Redeployed snowflake-server on the snowflake-01 bridge, disabling profiling and raising the keepalive timeout from 2 minutes to 10 minutes.
comment |
| 2022-09-23 | snowflake |
Deployed memory use optimizations and enabled profiling on the snowflake-01 bridge. Reduced the keepalive timeout from 10 minutes to 2 minutes. Increased the size of the clientID-to-IP map from 10240 to 98304.
comment |
| 2022-09-22 | snowflake |
Increased the number of tor instances on the snowflake-01 bridge from 4 to 8.
mailing list post comment |
| 2022-09-21 to 2022-10-04 | Unknown Country |
Abnormal increase in estimated meek users, believed to be caused by an overloaded meek-azure bridge.
forum thread |
| 2022-09-21 to present | Iran |
Protests and daily Internet shutdowns in Iran.
OONI report BBS thread |
| 2022-08-25 | Turkmenistan snowflake |
Used an alternate STUN port number in Connection Assist for Snowflake in Turkmenistan, and represented STUN servers as IP addresses rather than hostnames.
merge request |
| 2022-08-12 |
Release of tor 0.4.5.14, 0.4.6.12 and 0.4.7.10, with a fix to the geoip database.
announcement |
|
| 2022-08-12 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Tue, 09 Aug 2022 06:11:25 GMT" (geoip-db-digest 0AE7077313A53103C2B32100D74AAFC04216289D, geoip6-db-digest DCBF1789BF1EEB03276B830CB2AB92BCF779D97F).
commit |
| 2022-08-11 |
Release of tor 0.4.5.13, 0.4.6.11 and 0.4.7.9, with congestion control changes aimed at mitigating the DDoS attack that started 2022-06-06.
announcement |
|
| 2022-08-11 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Thu, 11 Aug 2022 05:41:58 GMT" (geoip-db-digest A642DB3FC558C9C609159064A32CD4FBCA254CCA, geoip6-db-digest C8CB9E5727CCE1479D595EBFEF5D9AAC1C9B9E94).
commit |
| 2022-08-10 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Fri, 17 Jun 2022 06:11:30 GMT" (geoip-db-digest C8CC32FB272CDC7D2C310839D3BE02C49053918D, geoip6-db-digest 0CC43D240A9A4B2B218A8A6DA20EA03EE0BB6912).
commit |
| 2022-08-05 | China obfs4 Unknown |
Sudden drop in access to bridges from the "https" pool from China.
comment bridge graph |
| 2022-07-30 | Indonesia |
Mass blocking of websites in Indonesia.
article |
| 2022-07-29 | Russia |
The domain www.torproject.org and its IP addresses are again blocked, after having been unblocked on 2022-07-14. Other subdomains of torproject.org remain unblocked.
record GitLab comment BBS comment zapret-info diff OONI measurements |
| 2022-07-14 | Bridges |
Release of Tor Browser 11.5, with a new Connection Assist feature for automatic censorship circumvention configuration.
blog post graph of effect on Snowflake initial country-specific settings initial default settings |
| 2022-07-14 | Russia |
The Tor Project web server block, which had begin on 2021-12-07, is lifted.
record GitLab comment BBS comment zapret-info diff OONI measurements |
| 2022-06-27 | snowflake |
Release of Snowflake WebExtension 0.6.0. The main feature added in this release was support for more than one bridge. It had a bug that caused it to stop reporting client IP addresses, which caused a fraction of Snowflake usage to be attributed to the unknown country ?? in metrics, rather than being properly geolocated.
archive merge request issue |
| 2022-06-17 |
Release of tor 0.4.7.8, fixing a DoS vulnerability relating to the new congestion control in 0.4.7.7 (TROVE-2022-001, CVE-2022-33903.
announcement issue |
|
| 2022-06-16 | snowflake |
Began periodic restarts of Snowflake's probetest NAT measurement service, which increased the success rate of proxies self-measuring their NAT type.
issue comment |
| 2022-06-06 to 2023-04-05 |
Network-wide DDoS attack.
status.torproject.org issue forum thread graph onion v3 traffic |
|
| 2022-05-23 |
Release of Tor Browser 11.0.13, the first stable release with congestion control.
blog post |
|
| 2022-05-12 | Uzbekistan meek Unknown |
meek users in Uzbekistan drop to zero.
issue bridge users graph |
| 2022-05-06 | snowflake |
Upgraded the network uplink of the Snowflake bridge from 1 Gbps to 10 Gbps.
issue |
| 2022-04-27 |
Release of tor 0.4.7.7, the first release with congestion control.
forum post blog post |
|
| 2022-04-12 | snowflake |
Stopped the tor instances flakey1–flakey8 on the interim Snowflake bridge, leaving only instances flakey1–flakey4 running on the new bridge.
comment |
| 2022-04-11 | snowflake |
Moved Snowflake traffic to a new bridge running instances flakey1–flakey4.
comment |
| 2022-04-11 to 2022-04-12 | Turkmenistan |
The intensity of Internet blocking in Turkmenistan increases. Some sources inside the country claim that "the Internet has been blocked almost completely".
NTC thread Access Now post Cloudflare Radar tweet |
| 2022-04-11 | snowflake |
Started a new Snowflake bridge running tor instances flakey1–flakey4, temporarily running in parallel with the interim bridge with its instances flakey1–flakey8.
comment |
| 2022-03-19 | snowflake |
Stopped the tor instances flakey1–flakey4 on the old Snowflake bridge, leaving only instances flakey1–flakey8 running on the interim bridge.
comment |
| 2022-03-18 | snowflake |
Restarted the interim Snowflake bridge to correct a problem with onion keys.
comment |
| 2022-03-16 | snowflake |
Moved Snowflake traffic to the interim bridge running instances flakey1–flakey8.
comment |
| 2022-03-15 | snowflake |
Started an interim Snowflake bridge running tor instances nicknamed flakey1–flakey8, temporarily running in parallel with the main bridge with its instances flakey1–flakey4.
comment |
| 2022-02-28 | Bridges |
BridgeDB moves to an rdsys backend.
announcement issue |
| 2022-02-24 to present | Russia Ukraine |
Russian invasion of Ukraine. In the following days, various social media are partially blocked in Russia. Bridge users increase in Russia; relay and bridge users increase in Ukraine.
Wikipedia Relay users in Russia Bridge users in Russia Relay users in Ukraine Bridge users in Ukraine OONI article |
| 2022-02-18 | snowflake |
Outage of the Snowflake bridge.
mailing list post alert failed alert succeeded |
| 2022-02-04 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Fri, 04 Feb 2022 05:51:31 GMT" (geoip-db-digest C4F1B5ECF1B07BBECBE06B93926E4D1E62882782, geoip6-db-digest 0E43B5C62033BFE47F32742D8C9F5B5F83180AA4).
commit |
| 2022-02-01 |
Tor 0.3.5 reaches end of life.
mailing list post |
|
| 2022-01-31 | snowflake |
Switched the snowflake bridge from a load-balanced staging server back to the now load-balanced production server. Debugged connection problems until 2022-01-31 19:52:04.
issue comment comment |
| 2022-01-30 | snowflake |
Rebuilt the production bridge, which had run a single flakey instance, to run four instances flakey1–flakey4.
comment |
| 2022-01-28 | snowflake |
Switched the snowflake-server (at the time running on a load-balanced staging server) for a version with CPU profiling.
comment |
| 2022-01-25 | snowflake |
Switched the snowflake bridge to the temporary load-balanced staging server. Debugged connection problems until 2022-01-25 18:47:00.
issue comment post comment |
| 2022-01-24 | snowflake |
Started a temporary load-balanced Snowflake staging server running four instances flakey1–flakey4. Ran in parallel with the existing production instances (single flakey until 2022-01-30 04:51:00, flakey1–flakey4 thereafter) and the flakey1–flakey4 instances of the practice staging bridge until 2022-02-03 05:39:24.
comment |
| 2022-01-24 to 2022-02-10 | Uzbekistan Relays Unknown |
Temporary decrease in relay users in Uzbekistan.
relay users graph |
| 2022-01-17 to 2022-02-03 | snowflake |
Ran a practice Snowflake staging bridge with four instances flakey1–flakey4, initially in parallel with the production bridge running a single flakey instance.
comment mailing list post |
| 2022-01-12 to 2022-08-08 | webstats Unknown |
Tor Browser update pings drop temporarily. A similar effect is present in other years.
graph issue issue |
| 2022-01-11 to 2022-02-01 | Burkina Faso obfs4 Unknown |
Temporary spike in obfs4 users from Burkina Faso.
bridge users graph |
| 2022-01-10 | Kazakhstan obfs4 |
The Tor Project begins to distribute obfs4 bridges that listen on ports that are reachable in Kazakhstan, despite the ongoing Internet shutdown.
forum post |
| 2022-01-07 | snowflake |
Increased capacity of the mapping to client IP addresses on the snowflake bridge.
issue deployment comment |
| 2022-01-05 to 2022-01-11 | Kazakhstan |
Country-wide Internet shutdown in Kazakhstan. Was preceded by a shutdown of most mobile networks starting 2022-01-04 14:30. Access was restored for a few hours each day.
Cloudflare blog post RIPE Labs blog post NTC thread BBS thread IODA |
| 2022-01-04 | Gambia |
Internet outage in Gambia.
blog post |
| 2021-12-29 | snowflake |
Outage of the snowflake bridge.
comment alert failed alert succeeded |
| 2021-12-24 | Russia obfs4 |
Another round of obfs4 enumeration and blocking occurs in Russia.
comment |
| 2021-12-22 to present | Finland Relays Unknown |
Increase of relay users in Finland.
tor-talk thread possible explanation graph |
| 2021-12-22 | snowflake |
Rebooted the Snowflake bridge to increase the number of CPUs from 4 to 8.
issue |
| 2021-12-20 | snowflake |
Release of Tor Browser 11.0.3, with an altered DTLS fingerprint in Snowflake to counteract blocking in Russia.
blog post issue NTC post |
| 2021-12-15 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Wed, 15 Dec 2021 06:07:42 GMT" (geoip-db-digest BE1D08BC7B80B1D94CC1B67E5F59CECE9D282F99, geoip6-db-digest E7C6C7875CF972346E01F8E87E87E77D939437DB).
commit |
| 2021-12-14 | snowflake |
Release of Tor Browser 11.5a1, with an altered DTLS fingerprint in Snowflake to counteract blocking in Russia.
blog post issue NTC post |
| 2021-12-13 | Russia |
The fraction of networks in Russia blocking Tor, measured by OONI, increases from about 20% to about 50%.
relay graph |
| 2021-12-08 | obfs4 |
Release of Tor Browser 11.0.2, containing a new default obfs4 bridge "deusexmachina".
blog post issue |
| 2021-12-08 | Russia |
The Tor Project web server block is expanded from *.www.torproject.org to *.torproject.org.
record GitLab comment NTC comment zapret-info diff |
| 2021-12-07 | Russia |
The www.torproject.org web server is added to the registry of blocked domain names in Russia, by IP addresses and by hostname *.www.torproject.org.
record GitLab comment NTC comment zapret-info diff OONI report |
| 2021-12-01 to 2021-12-13 | Russia meek |
Blocking of the IP address of the meek-azure front domain in certain ISPs in Russia, part of a wider phenomenon of blocking Tor beginning 2021-12-01.
post about start (2021-12-03) post about end (2021-12-13) post about end (2021-12-15) post about end (2021-12-26) |
| 2021-12-01 to present | Russia |
Blocking of Tor directory authorities, relays, default obfs4 bridges, meek-azure, and Snowflake in some ISPs in Russia. There was a temporary cease of blocking for less than a day starting on 2021-12-08.
NTC thread BBS thread issue blog post OONI report |
| 2021-11-22 to 2022-11-28 | Burkina Faso |
Shutdown of mobile Internet in Burkina Faso.
article relay users graph tweet |
| 2021-11-17 to 2022-02-02 | obfs4 |
Run a Tor Bridge campaign, offers rewards for running obfs4 bridges.
blog post about start blog post about end |
| 2021-11-08 |
Removal of roughly 600 "KAX17" non-exit relays.
mailing list post relay graph article |
|
| 2021-11-08 | onion |
Release of Tor Browser 11.0. Final deprecation of v2 onion services.
blog post deprecation timeline graph |
| 2021-11-07 | Nicaragua |
General elections in Nicaragua. Temporary increase in relay users.
article Wikipedia relay users graph |
| 2021-10-29 | Turkmenistan Relays Unknown |
Further decrease of relay users in Turkmenistan.
comment discussion |
| 2021-10-25 to 2021-11-18 | Sudan |
Internet shutdown in Sudan.
article article Cloudflare Radar blog post relay users graph |
| 2021-10-24 | Turkmenistan snowflake Unknown |
Snowflake users in Turkmenistan drop to zero, possibly as a result of blocking of the broker's domain-fronting channel.
issue comment discussion |
| 2021-10-24 | Uzbekistan |
National elections in Uzbekistan.
article relay users graph |
| 2021-10-08 to 2021-11-14 | Netherlands Relays Unknown |
Temporary quintupling of direct users from the Netherlands.
relay graph |
| 2021-10-03 to present | Egypt Relays Unknown |
Increase of relay users in Egypt.
Twitter thread relay graph |
| 2021-10-01 to 2021-10-07 | Belarus Relays |
Increase of users in Belarus, relay only. According to OONI data, the Tor Project website was unblocked and Tor direct connections were accessible for a few days and, then, it was blocked again.
graph OONI Tor test |
| 2021-09-22 to 2021-10-07 |
Experiment to investigate the accuracy of relays' advertised bandwidth.
status.torproject.org mailing list post advertised bandwidth graph |
|
| 2021-08-31 to 2021-09-12 | Brazil Relays |
Increase of users in Brazil, relay only, due protests.
graph article |
| 2021-08-27 to 2021-09-08 |
Experiment to investigate the accuracy of relays' advertised bandwidth.
status.torproject.org mailing list post advertised bandwidth graph |
|
| 2021-08-12 to 2021-08-14 | Zambia |
Block of social media websites and WhatsApp during the national elections. Increase in the number of users.
article ticket OONI report relay graph bridge graph |
| 2021-08-12 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Thu, 12 Aug 2021 05:51:15 GMT" (geoip-db-digest B3A9770171D3060502B7F13C0618BE109B92DF6C, geoip6-db-digest 410B70763FC675B3622264FAA0FC67B78FDE30C2).
commit |
| 2021-08-08 | Ukraine Relays Unknown |
Large increase of relay users in Ukraine. Bridge users unaffected.
comment anti-censorship team discussion relay graph bridge graph |
| 2021-07-22 to 2021-07-31 | Turkmenistan Relays Unknown |
Decrease in relay users by 75% in Turkmenistan, following a period of elevated usage that began in early 2021.
ticket anti-censorship team discussion NTC thread |
| 2021-07-06 | snowflake |
Release of Tor Browser 10.5, first stable release that includes Snowflake.
blog post |
| 2021-06-20 to 2021-06-24 | Algeria |
Social media blocking during national high school exams.
SMEX |
| 2021-06-15 | snowflake |
Snowflake bridge down for scheduled upgrade.
comment |
| 2021-06-12 to 2021-06-13 | snowflake |
Outage of Snowflake bridge.
issue |
| 2021-06-10 to present |
Experiment to test latencies between relays.
status.torproject.org post announcing start |
|
| 2021-06-10 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Thu, 10 Jun 2021 05:17:29 GMT" (geoip-db-digest 900E9BD6C8B8679A1539F7F316974E86618038B2, geoip6-db-digest 456BCA0796A27F8C80674EE89B1323F8310BED39).
commit |
| 2021-06-04 to present | Nigeria |
Block of Twitter in Nigeria. Increase in the number of bridge users.
article relay graph bridge graph |
| 2021-05-17 to 2021-06-05 |
Experiment to test the accuracy of relays' advertised bandwidth estimation.
status.torproject.org post announcing start post announcing end advertised bandwidth graph relay flags graph |
|
| 2021-05-14 to 2021-05-18 | meek Unknown |
The number of meek users temporarily drops to < 10.
graph |
| 2021-05-12 to 2021-06-21 | snowflake |
Error in stats collection at the Snowflake bridge; user count is erroneously zero.
merge request comment on start comment on end user count graph |
| 2021-05-07 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Fri, 07 May 2021 05:18:14 GMT" (geoip-db-digest AE864EA783E3776E4950859B5B35F412977F876F, geoip6-db-digest 7008D77E958D919E432AAE7F5C2002B14604FFFE).
commit |
| 2021-05-05 | Turkmenistan meek Unknown |
Drop in meek users in Turkmenistan, from over 200 to almost zero.
bridge user and transport graph |
| 2021-05-03 | snowflake |
Outage of snowflake bridge.
comment |
| 2021-04-14 | snowflake |
Release of Tor Browser 10.5a14. Changes the Snowflake's domain fronting rendezvous to use Fastly rather than Azure.
blog post issue |
| 2021-04-13 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Tue, 13 Apr 2021 05:11:07 GMT" (geoip-db-digest D63E30D25E7767178177C53A0248083011B4202A, geoip6-db-digest 891E8F6FBC7973144E335F0D815B5AF6B6DDF74B).
commit |
| 2021-04-09 | Turkmenistan obfs4 |
Turkmenistan blocks the default obfs4 bridge hopperlab, the last remaining obfs4 bridge at the time.
comment |
| 2021-04-01 to present | Myanmar |
Shutdowns of wireless broadband in Myanmar.
Access Now post |
| 2021-03-16 | ipv4 ipv6 |
Release of tor 0.3.5.14, 0.4.4.8, and 0.4.5.7. Changes the source of geolocation databases from Maxmind to IPFire.
blog post announcement ticket commit |
| 2021-03-14 | Turkmenistan obfs4 |
Turkmenistan blocks the default obfs4 bridges PraxedisGuerrero and smallerRichard.
comment |
| 2021-03-12 | ipv4 ipv6 |
geoip and geoip6 databases updated to "IPFire Project Fri, 12 Mar 2021 05:05:24 GMT" (geoip-db-digest 7EFC262380D93924340A0000DF78EC4DD3BFC0E5, geoip6-db-digest B53EF6F829B6A1B1DD242835B6A23580178FBE13).
commit |
| 2021-03-11 | Belarus Relays Unknown |
Drop of relay users in Belarus. Bridge users are not affected.
relay graph bridge graph |
| 2021-03-10 |
Fire in the OVHcloud data centers located in Strasbourg takes about 48 relays offline in AS16276.
OVHcloud advisory Twitter thread |
|
| 2021-03-09 | flashproxy |
Decommissioned flash proxy badge server, flashproxy.bamsoftware.com.
|
| 2021-03-08 | flashproxy |
Decommissioned flash proxy facilitator: server, flashproxy-reg-email poller, and flashproxy-reg-appspot app.
|
| 2021-03-08 | snowflake |
Outage of the Snowflake bridge.
ticket |
| 2021-03-04 to 2021-03-10 | webstats Unknown |
Tor Browser update pings temporarily drop further, for Windows only.
graph issue |
| 2021-02-23 | snowflake |
Release of Orbot 16.4.1-BETA-2-tor.0.4.4.6, with experimental Snowflake proxy support.
release |
| 2021-02-15 to 2021-04-27 | Myanmar |
Nightly shutdowns of fixed-line Internet in Myanmar.
relay graph bridge graph OONI report IODA for start IODA for end Access Now post censorship-analysis issue |
| 2021-02-13 | Belarus Bridges meek obfs4 |
Blocking of default obfs4 bridges and email-distributed bridges in Belarus. Relay users are not affected.
ticket BBS thread NTC thread relay graph bridge graph |
| 2021-02-06 to 2021-02-07 | Myanmar |
Internet shutdown in Myanmar.
relay graph bridge graph OONI report IODA |
| 2021-01-31 to 2021-02-01 | Myanmar |
Partial Internet shutdown after coup in Myanmar.
relay graph bridge graph article IODA OONI report |
| 2021-01-27 | snowflake |
Deployed version 0.5.3 of the Snowflake WebExtension, with improvements to NAT handling.
archive ticket comment |
| 2021-01-26 | Bridges |
Release of Tor Browser 10.5a8, which fixes the bug preventing the use of default bridges.
blog post issue |
| 2021-01-20 | Bridges |
Release of Tor Browser 10.5a7, which has a bug preventing the use of default bridges.
blog post issue issue |
| 2021-01-17 to 2021-01-21 | snowflake Unknown |
Decrease in measured Snowflake users. May have been caused by a drop of NAT-unrestricted proxies.
mailing list thread comment |
| 2021-01-16 to 2021-07-03 | webstats Unknown |
Tor Browser update pings drop temporarily. A similar effect is present in other years.
graph issue |
| 2021-01-13 to 2021-01-17 | Uganda |
Internet shutdown in Uganda during general election.
OONI report |
| 2021-01-12 | snowflake |
Release of Orbot 16.4.0-RC-1-tor-0.4.4.6, first release with Snowflake client support.
release |
| 2021-01-10 to 2021-02-03 | onion |
Large amounts of traffic at directory authorities disrupts consensus, which causes v3 onion services to stop working because of a bug. Tor 0.3.5.13, 0.4.3.8, and 0.4.4.7 have a fix for the bug.
ticket blog post onion service traffic graph Tor blog post Tor Browser blog post status.torproject.org |
| 2021-01-07 | snowflake |
Changed the DNS records for snowflake.freehaven.net and snowflake-broker.bamsoftware.com to be CNAME records for the corresponding torproject.net domains, rather than bamsoftware.com, in order to avoid malware warnings.
ticket |
| 2021-01-01 to present | China snowflake Unknown |
Increased failure to bootstrap using Snowflake from China.
comment |
| 2020-12-17 to 2020-12-20 | snowflake |
DDoS attack on Greenhost, where the Snowflake broker and bridge and onionperf instances are hosted.
2020-12-17 status 2020-12-20 status anti-censorship-team thread |
| 2020-12-05 to 2020-12-09 | meek moat |
An update to an Azure CDN edge server TLS certificate causes an outage of meek and Moat. It is fixed by the release of Tor Browser 10.0.6, which updates the built-in public key pinning of obfs4proxy.
ticket blog post meek graph BridgeDB graph certificate transparency |
| 2020-11-17 | snowflake |
Release of Snowflake WebExtension 0.5.2, with a fix to the NAT type self-test.
archive merge request comment |
| 2020-11-08 to 2020-11-09 | snowflake |
Outage of the snowflake bridge
ticket |
| 2020-10-29 | snowflake |
Release of Snowflake WebExtension 0.5.0, with a NAT type self-test.
archive issue |
| 2020-10-27 to present | Tanzania, United Republic of OR obfs4 |
Blocking of Tor and default obfs4 bridges during elections in Tanzania.
OONI report |
| 2020-10-13 | Belarus Unknown |
Sudden decrease of relay users in Belarus, from 4000 to 1000, with simultaneous increase of bridge users.
BBS thread NTC thread relay graph bridge graph |
| 2020-10-05 | snowflake |
Deployed version 0.4.2 of the Snowflake WebExtension, with better counting of clients.
archive comment |
| 2020-09-27 to 2020-11-10 | Azerbaijan |
Blocking of social media and instant messaging in Azerbaijan during the 2020 Nagorno-Karabakh war
OONI/AIW report IPHR/AIW report relay graph bridge graph |
| 2020-08-31 | obfs4 |
Shutdown of default obfs4 bridge frosty.
ticket |
| 2020-08-24 | snowflake |
The Snowflake broker begins reporting counts of proxy NAT types.
issue |
| 2020-08-19 | snowflake |
Release of Tor Browser 10.0a5, which added the ability to do NAT behavior discovery to the Snowflake client.
blog post issue |
| 2020-08-13 | snowflake |
Deployed version 0.4.1 of the Snowflake WebExtension, with NAT type detection in the browser.
archive comment |
| 2020-08-09 to 2020-08-12 | Belarus |
Internet shutdowns in Belarus, during protests following a presidential election.
report thread |
| 2020-07-06 | snowflake |
Deployed NAT-aware matching at the Snowflake broker.
comment |
| 2020-06-30 to 2020-07-23 | Ethiopia |
Internet shutdown in Ethiopia. Restrictions were partially lifted 2020-07-15.
article article IODA relay users graph |
| 2020-06-25 | snowflake Unknown |
One- or two-day spike in estimated Snowflake users. It resembles the spike that occurred around the time of the Turbo Tunnel release of Tor Browser 9.5a13 on 2020-05-22.
users graph |
| 2020-06-02 | snowflake |
Release of Tor Browser 10.0a1, the first release with Snowflake for Android.
blog post ticket |
| 2020-05-22 | snowflake |
Release of Tor Browser 9.5a13, the first release with Turbo Tunnel session persistence features for Snowflake. There is a spike in estimated users on 2020-05-21 and 2020-05-22, which appears to be an artifact.
blog post ticket users graph |
| 2020-04-23 | snowflake |
Redeployed the Snowflake bridge with support for non–Turbo Tunnel clients and KCP–Turbo Tunnel clients, removing support for QUIC–Turbo Tunnel clients.
comment |
| 2020-03-02 to 2020-03-03 | Iran |
Farsi-language edition of Wikipedia blocked in Iran.
OONI report Censored Planet |
| 2020-02-22 | snowflake |
Made the Snowflake bridge stop reporting client IP addresses of 0.0.0.0. This also affects log messages that report how many client connections had an attached IP address.
comment |
| 2020-02-19 | snowflake |
Deployed a Turbo Tunnel–capable Snowflake bridge.
comment |
| 2020-02-18 | snowflake |
Outage of the Snowflake bridge caused by memory exhaustion.
ticket |
| 2020-01-09 to 2020-06-08 | webstats Unknown |
Tor Browser update pings drop temporarily. A similar effect is present in other years.
graph issue metrics-team thread |
| 2019-12-06 | ipv4 ipv6 |
geoip and geoip6 databases updated to "December 3 2019 Maxmind GeoLite2 Country" (geoip-db-digest 4974C4F1F6842975999D0774F2636F383312EA2D, geoip6-db-digest 2046D67D7BBE67AFF12E1CEDD9F9083AB5E3DFAC).
commit |
| 2019-12-03 | snowflake |
Release of version 0.2.0 of the Snowflake extension for Firefox and Chrome. Now reports the proxy type to the broker.
comment |
| 2019-11-16 to 2019-11-23 | Iran |
Internet blackout in Iran.
report NTC thread |
| 2019-11-14 | ipv6 snowflake |
Changed DNS to point to the IPv6-enabled Snowflake broker.
comment |
| 2019-11-14 | snowflake |
Deployed webext-0.1.0 of the Snowflake proxy (which uses a new proxy–broker protocol) to snowflake.torproject.org.
comment |
| 2019-11-13 | snowflake |
Released version 0.1.0 of the Snowflake extension for Firefox and Chrome, using a new proxy–broker protocol.
comment |
| 2019-11-13 | snowflake |
Restarted the broker with a new proxy–broker protocol.
comment |
| 2019-11-09 | ipv4 ipv6 |
geoip and geoip6 databases updated to "November 6 2019 Maxmind GeoLite2 Country" (geoip-db-digest 967E4D14ADF0C9439C31FB7B666537A0551C1E6A, geoip6-db-digest BD6E89A28801FA447693EDEC6D47ECCA03B8CD20).
commit |
| 2019-10-28 | snowflake |
Version 0.0.13 of the Snowflake extension is released, decreasing the poll frequency to once every 300 s. The standalone proxy-go instances still poll once every 5 s.
comment |
| 2019-10-22 | fte |
Release of Tor Browser 9.0, removes support for FTE.
blog post ticket |
| 2019-10-17 | snowflake |
Pointed snowflake-broker.torproject.net (one of three domain names for the Snowflake broker) to a new broker instance set up with IPv6. Metrics unintentionally start being collected from the new instance, instead of the old instance that was still in use.
ticket ticket |
| 2019-10-03 | China obfs4 |
The new default bridge 193.11.166.194 is already blocked by the GFW – two days after the Tor Browser alpha release that shipped with it. The block may have happened sooner, though. We only tested the bridge just now.
ticket |
| 2019-10-02 | ipv4 ipv6 |
geoip and geoip6 databases updated to "October 1 2019 Maxmind GeoLite2 Country" (geoip-db-digest 34ABC09019FAB09BA3083B3663EC0B807FC16151, geoip6-db-digest F4D3BEC6294DF7FAEAEE5966CC6706CF91CE9BC4).
commit |
| 2019-10-01 | snowflake |
Release of Tor Browser 9.0a7, the first release that has Snowflake for Windows.
blog post ticket |
| 2019-09-20 to 2019-09-22 | Egypt |
Blocking of news sites and commuications apps in Egypt during protests.
OONI report Censored Planet Wikipedia Amnesty International |
| 2019-08-06 to 2019-08-09 |
Experiment to test the accuracy of relays' advertised bandwidth estimation.
description of experiment post announcing start post announcing end advertised bandwidth graph relay flags graph |
|
| 2019-07-27 | snowflake |
The Snowflake proxy hosted at snowflake.torproject.org is updated, changing domains from bamsoftware.com to freehaven.net in order to work around the Google Safe Browsing block.
comment |
| 2019-07-27 | snowflake |
Deployed version 0.0.7 of the Snowflake WebExtension for Chrome, changing domains from bamsoftware.com to freehaven.net in order to work around the Google Safe Browsing block.
comment |
| 2019-07-26 | flashproxy snowflake |
Cupcake 2.0 is released, now working with Snowflake rather than flash proxy.
Chrome Web Store page |
| 2019-07-26 | snowflake |
Deployed version 0.0.8 of the Snowflake WebExtension for Firefox, changing domains from bamsoftware.com to freehaven.net in order to work around the Google Safe Browsing block.
comment |
| 2019-07-23 | snowflake |
The broker domain name snowflake-broker.bamsoftware.com is blocked by Google Safe Browsing, preventing the Snowflake web browser extension from working.
ticket comment noting decrease in proxies |
| 2019-07-18 to 2019-08-07 | Kazakhstan |
The Kazakh ISP KazTelecom does man-in-the-middle of TLS connections.
Censored Planet report post about end |
| 2019-07-09 | obfs3 |
Release of Tor Browser 8.5.4 and 9.0a4. Removes the last remaining default obfs3 bridges.
8.5.4 blog post 9.0a4 blog post issue #31055 issue #31058 |
| 2019-07-03 | snowflake |
Deployed version 0.0.1 of the Snowflake WebExtension for Chrome.
comment |
| 2019-07-02 to 2019-08-26 | Iran OR Bridges Relays |
Relays in Iran are reported to be unblocked once again, and user numbers recover to about 25% of the maximum they had reached during the previous period of unblocking. They then drop precipitously, and OR bridge users increase.
ticket comment comment |
| 2019-06-26 | snowflake |
Deployed version 0.0.1 of the Snowflake WebExtension for Firefox.
comment |
| 2019-06-21 to present | Myanmar |
Internet shutdown in parts of Myanmar.
report 2020 report |
| 2019-06-20 | obfs4 |
A call to set up new obfs4 bridges is posted to the tor-relays mailing list.
mailing list thread thread continues |
| 2019-06-11 | ipv4 ipv6 |
geoip and geoip6 databases updated to "June 10 2019 Maxmind GeoLite2 Country" (geoip-db-digest A131E1F283F4AD307248B03A70B0413E81ADF2A4, geoip6-db-digest 0EFF3EE1E22927EC9A77BFFAFD703F3A5B32FA79).
commit |
| 2019-05-28 |
Failure of network equipment at site of op-ab OnionPerf instance (equipment now replaced)
onionperf timeouts graph |
|
| 2019-05-22 | fte |
Release of Tor Browser 9.0a1, removes support for FTE.
blog post ticket |
| 2019-05-17 | ipv4 ipv6 |
geoip and geoip6 databases updated to "May 13 2019 Maxmind GeoLite2 Country" (geoip-db-digest 35DFDA2D06D2A0467EF37D60A67B438B11952B74, geoip6-db-digest C0193A1D086819353FABBF70AADB15866B7B2525).
commit |
| 2019-05-16 to 2019-06-23 | Iran Relays |
Tor becomes directly accessible in Iran, leading to an explosion in relay users up to about 1.5 million, before being blocked again.
ticket comment about end tor-talk thread Reddit thread comment Reddit thread |
| 2019-05-01 | China snowflake |
China blocks the default Snowflake proxies.
ticket |
| 2019-04-29 |
Network equipment failure at site of op-ab OnionPerf instance
performance graph |
|
| 2019-04-28 to 2019-04-29 | Benin |
Social media blocking and Internet blackout during parliamentary elections in Benin.
OONI report |
| 2019-04-27 to present | Russia Relays Unknown |
Relay users increase by about 100K, in an apparent weekly cycle. Bridge users are not similarly affected.
relay graph bridge graph tor-talk thread Reddit thread |
| 2019-04-21 to 2019-05-01 | Sri Lanka |
Sri Lanka blocks Facebook, WhatsApp, Instagram, YouTube after bombings.
relay graph bridge graph Access Now post Censored Planet |
| 2019-04-16 | snowflake |
Outage of Snowflake fallback proxy-go instances, caused by a failure to restart after segregating old logs.
ticket |
| 2019-04-03 | ipv4 ipv6 |
geoip and geoip6 databases updated to "April 2 2019 Maxmind GeoLite2 Country" (geoip-db-digest 62A97D4DEBF76A5CE5C232B95BBF05B191EB8AAA, geoip6-db-digest 66620E57A8427C53D6084B3229807DC320CDC3D0).
commit |
| 2019-03-22 | snowflake |
Outage of the Snowflake broker, caused by a full disk.
ticket |
| 2019-03-07 to 2019-03-30 | Venezuela |
Power outages in Venezuela.
Wikipedia relay users graph IODA |
| 2019-03-06 | ipv4 ipv6 |
geoip and geoip6 databases updated to "March 4 2019 Maxmind GeoLite2 Country" (geoip-db-digest 5B90C2F06292D8237A5C77E27ED4ABABF4AE0684, geoip6-db-digest E971FCA4A89F6C685928FF9371D1BF7A2484F4CA).
commit |
| 2019-02-16 to present | Belarus Relays Unknown |
Increase of relay users in Belarus.
graph mailing list post |
| 2019-02-12 | ipv4 ipv6 |
geoip and geoip6 databases updated to "February 5 2019 Maxmind GeoLite2 Country" (geoip-db-digest DDAA25B4425EAA45EE8E92A6531CD3246C8E989A, geoip6-db-digest 0368FA722D90026E60BD60A26F615791A7A53D21).
commit |
| 2019-02-07 | snowflake |
Disabled the 3 proxy-go instances that were pointing at the former broker hosted on App Engine.
comment |
| 2019-01-30 to 2019-04-07 | webstats Unknown |
Tor Browser update pings drop temporarily. A similar effect is present in other years.
graph issue metrics-team thread |
| 2019-01-21 | Venezuela |
Blocking of social media in Venezuela.
OONI report Censored Planet |
| 2019-01-14 to 2019-01-21 | Zimbabwe |
Internet shutdown and blocking of Facebook, WhatsApp, and Twitter in Zimbabwe.
article OONI report Censored Planet |
| 2019-01-12 to 2019-01-18 | Venezuela |
Blocking of Wikipedia in Venezuela.
OONI report Censored Planet |
| 2019-01-07 | Bridges |
Release of tor 0.3.5.7, 0.3.4.10, and 0.3.3.11. Fixes the bug, present since 0.3.5.1-alpha/0.3.4.1-alpha, of idle bridges being unuseful.
comment ticket blog post ticket |
| 2019-01-07 | ipv4 ipv6 |
geoip and geoip6 databases updated to "January 3 2019 Maxmind GeoLite2 Country" (geoip-db-digest 2B8A70B399CF8B471289A4DB52947DE965D8DE5F, geoip6-db-digest FEA33E6F398DF67252F41DDD3D010E69B33D544E).
commit |
| 2019-01-07 to 2019-01-08 | Gabon |
Internet shutdown in Gabon following a coup attempt.
OONI report NetBlocks report |
| 2018-12-20 to present | Sudan |
Protests and social media blocks in Sudan.
relay graph Access Now post Psiphon users |
| 2018-12-18 to 2018-12-21 | United Arab Emirates OR |
Reported blocking of vanilla Tor in the UAE.
comment |
| 2018-12-05 | ipv4 ipv6 |
geoip and geoip6 databases updated to "December 5 2018 Maxmind GeoLite2 Country" (geoip-db-digest 0684E08BDC01ABB41A717E9C55BDEB21531CFAC8, geoip6-db-digest AFFAD1475879D57B1C1EA119141EFA0E57547290).
commit |
| 2018-11-26 to 2018-11-28 |
Outage of the onionperf-us instance, caused by a Greenhost east coast VPS migration.
mailing list post |
|
| 2018-11-26 to 2018-11-28 | flashproxy |
Outage of the flash proxy badge hosting server, flashproxy.bamsoftware.com, caused by a Greenhost east coast VPS migration.
|
| 2018-11-19 to 2018-11-27 |
Slow-running processes on the metrics host cause an observed drop in the overall relay bandwidth graph.
mailing list thread |
|
| 2018-11-16 to 2018-11-22 | snowflake |
A full disk stops the Snowflake bridge and fallback proxies from working.
ticket |
| 2018-11-11 | ipv4 ipv6 |
geoip and geoip6 databases updated to "November 6 2018 Maxmind GeoLite2 Country" (geoip-db-digest 603BE8A0CA1B7164D76DBC75A280C9CA0A556F65, geoip6-db-digest 1CEF662539C0D91EC07A7C5C13134E3317B451E4).
commit |
| 2018-10-25 to 2018-10-28 | Relays |
Gap in observed number of relay users, caused by the estimated fraction of reporting relays exceeding 100%.
metrics-team post ticket graph archived graph |
| 2018-10-10 | ipv4 ipv6 |
geoip and geoip6 databases updated to "October 9 2018 Maxmind GeoLite2 Country" (geoip-db-digest 76907A8345DA84CC724CDD573B6E08F6A089FEEB, geoip6-db-digest 5852AB4D3A96D7526DD47D5573CB4FA32BE4ECEB).
commit |
| 2018-09-26 to present | fte |
Outage of default FTE bridge 128.105.214.162:8080.
comment |
| 2018-09-26 to present | fte |
Outage of default FTE bridge 128.105.214.163:8080.
comment |
| 2018-09-18 | Bridges |
Release of tor 0.3.5.1-alpha, containing a bug that makes idle bridges unuseful.
|
| 2018-09-15 to 2018-09-16 | United Arab Emirates obfs4 |
Reported blocking of obfs4 in the UAE.
ticket comment |
| 2018-09-11 | ipv4 ipv6 |
geoip and geoip6 databases updated to "September 6 2018 Maxmind GeoLite2 Country" (geoip-db-digest C9118A0D763E069B890674A4D5000A3DB846746B, geoip6-db-digest 8A46B41B2AE16F3705C67DEECD20EAA50B043A51).
commit |
| 2018-09-10 | Bridges |
Release of tor 0.3.4.8, 0.2.9.17, 0.3.2.12, and 0.3.3.10. 0.3.4.8, containing a bug that makes idle bridges unuseful, becomes the stable release.
blog post |
| 2018-08-09 | ipv4 ipv6 |
geoip and geoip6 databases updated to "August 7 2018 Maxmind GeoLite2 Country" (geoip-db-digest 4C2E4FF8220FFFB4989564728701016DF705BCBF, geoip6-db-digest F3F5C576BF3E8D5FD9F6F33603D7BFD64DEAA8B5).
commit |
| 2018-08-04 to 2018-08-05 |
Collector was missing consensuses. They were recovered via recent relay consensus diffs.
metrics-team thread tor-relays thread |
|
| 2018-07-29 to 2018-08-08 | Bangladesh |
Protests over road safety in Dhaka, Bangladesh. Reports of mobile network throttling and blocking of Facebook.
New York Times article Daily Star article on throttling NetBlocks report |
| 2018-07-28 to present | Turkey Relays Unknown |
Another jump of relay users in Turkey, from 5k to about 30k.
relay graph bridge graph |
| 2018-07-21 | Bridges |
The estimated number of bridge users becomes available again, following the introduction of the new bridge authority Serge on 2018-07-13. The stats took about a week to reappear because of the discontinuity in bridge reporting affecting the estimated fraction of reporting bridges.
mailing list post graph |
| 2018-07-20 to 2019-05-02 | onion Unknown |
The number of v2 onion services increases from 70k to 100k.
comment |
| 2018-07-15 | snowflake |
Made the Snowflake bridge report to the new Serge bridge authority.
comment |
| 2018-07-14 | Bridges |
Release of Tor 0.2.9.16, 0.3.2.11, 0.3.3.9, and 0.3.4.5-rc. Switches bridge authority from Bifroest to Serge. The number of bridges begins counting up from zero as bridges are upgraded. The estimated number of bridge users remained unavailable until 2018-07-21 because of the discontinuity.
announcement ticket blog post number of bridges graph |
| 2018-07-14 to 2018-07-25 | Iraq |
Protests, Internet shutdowns, and social media blocks in Iraq.
relay graph NetBlocks post NRT article about end Psiphon users |
| 2018-07-13 | Bridges |
The replacement bridge authority Serge begins publishing bridge descriptors.
ticket ticket number of bridges graph |
| 2018-07-06 | Bridges |
The bridge authority Bifroest stops publishing bridge descriptors. Bridge stats are unavailable until 2018-07-13 and the introduction of a new bridge authority.
ticket ticket mailing list post number of bridges graph |
| 2018-07-06 | ipv4 ipv6 |
geoip and geoip6 databases updated to "July 3 2018 Maxmind GeoLite2 Country" (geoip-db-digest CFFD7B0544879150A31F966E83DBB7DDDFA16F49, geoip6-db-digest B25710F60CB23F0C76F58AFB0A26A26ACB701BB2).
commit |
| 2018-07-04 to 2018-07-06 | snowflake |
Outage of the Snowflake bridge, caused by a full disk.
ticket |
| 2018-07-01 to present | Uganda |
A social media tax takes effect in Uganda. The government pressures ISPs to block VPNs.
relay graph bridge graph BBC article AllAfrica article OONI report |
| 2018-06-27 | meek |
Release of Tor Browser 8.0a9 with non-working meek.
blog post ticket |
| 2018-06-24 to 2018-07-06 | snowflake |
Metrics for Snowflake are missing, for unknown reasons. The gap is nearly contemporaneous with the gap the measurements for all transports/bridges caused by Bifroest–Serge bridge authority switchover, but starts about 2 weeks earlier in Snowflake's case.
ticket |
| 2018-06-20 to present | Venezuela |
Venezuela's largest ISP, CANTV, blocks direct access to Tor and the IP addresses of default bridges. meek and non-default bridges are reported to work.
ticket mailing list post Access Now report |
| 2018-06-11 | ipv4 ipv6 |
geoip and geoip6 databases updated to "June 7 2018 Maxmind GeoLite2 Country" (geoip-db-digest 93112125248AD2C11A2531B934FD4AC03999738D, geoip6-db-digest BFD2B453F2D9DC875B7B0C464A185E6C3202534F).
commit |
| 2018-06-10 to 2018-07-11 | Turkey Relays Unknown |
Jump of relay users in Turkey, from 5k to about 30k. The timing of the beginning corresponds to the release of Tor Browser 7.5.5 and 8.0a8.
relay graph bridge graph comment |
| 2018-06-10 | meek |
Release of Tor Browser 8.0a8, removes meek-amazon option.
blog post |
| 2018-06-09 | meek |
Release of Tor Browser 7.5.5, removes meek-amazon option.
blog post |
| 2018-05-23 to 2018-07-01 | Bridges Unknown |
Sharp increase in bridge users in many unrelated countries, affecting even the global aggregate. Relay users unaffected. The graphs reach a peak around 2018-06-07 and then begin falling again. An incomplete sampling of affected countries: Bangladesh Chile Indonesia Morocco Venezuela.
relay graph bridge graph |
| 2018-05-22 to 2018-06-08 | Iraq obfs4 Unknown |
Increase in obfs4 users in Iraq, followed by a slow decrease. No matching change in relay users or other transports.
bridge graph |
| 2018-05-17 | Bridges |
Release of tor 0.3.4.1-alpha. Has a bug that makes idle bridges unuseful.
ticket ticket |
| 2018-05-15 | ipv4 ipv6 |
geoip and geoip6 databases updated to "May 1 2018 Maxmind GeoLite2 Country" (geoip-db-digest 765D2F123DDA7DAEA9C9263975E2B4BAFBD2B908, geoip6-db-digest 2AA568CC898BF9924FBACEA26946AA7ED10E7D87).
commit |
| 2018-05-14 | meek |
Disabled the d2cly7j4zqgua7.cloudfront.net CDN endpoint for meek-amazon.
Tor Browser ticket Orbot ticket |
| 2018-05-09 | snowflake |
Release of Tor Browser 8.0a7, which changes the default Snowflake rendezvous to use an Azure domain front, instead of the Google one that had been non-functional since 2018-04-13.
blog post ticket |
| 2018-05-08 | meek |
The meek-amazon bridge imposes a rate limit of 1 MB/s.
|
| 2018-05-08 | Russia |
Russia unblocks about 3.7 million IP addresses belonging to Google and Digital Ocean.
Roskomnadzor press release monitoring page |
| 2018-04-30 to present | Iran |
Iranian ISPs block Telegram.
ticket article relay graph bridge graph Psiphon users |
| 2018-04-25 to 2018-07-02 | onion Unknown |
The number of v2 onion services increases from 70k to 120k.
ticket |
| 2018-04-16 to 2018-05-08 | Russia |
Russia tries to block Telegram; blocks about 18 million IP addresses including some belonging to Amazon and Google cloud services.
article relay graph bridge graph |
| 2018-03-28 to 2019-07-13 | Chad |
Chad blocks social messaging apps.
article about end article about end graph |
| 2018-01-05 to present |
Outage of the op-hk OnionPerf instance.
op-hk graph |
|
| 2017-12-04 to present |
DDoS attack creates load on the network.
tor-relays thread relay graph summary post ticket |
|
| 2017-08-07 to present | Congo, The Democratic Republic of the |
The Democratic Republic of the Congo orders a block of social media services.
article relay graph bridge graph |
| 2017-03-01 to 2018-11-12 | United Arab Emirates OR Relays Unknown |
Another increase in relay users, slower and more sustained than the previous one.
graph ticket about end |
| 2017-02-10 to present | OR exit |
Measurement error from bandwidth authority causes decrease in measured bandwidth in Europe.
mailing list post |
| 2016-12-15 to present | Congo, The Democratic Republic of the |
The Democratic Republic of the Congo orders a block of social media services.
article relay graph bridge graph |
| 2016-11-03 to present | Turkey |
Turkey blocks Facebook, Twitter, YouTube, WhatsApp.
article |
| 2016-10-25 to present | Egypt OR Relays |
Egypt blocks Tor directory authorities and public relays by TCP RST. Bridges work.
OONI report |
| 2015-12-31 to 2020-06-04 | Mexico |
The Telmex ISP in Mexico blocks seven directory authorities.
mailing list post article |