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Tor Metrics
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Users

We estimate the number of users by analyzing the requests induced by clients to relays and bridges.

  • Relay users
  • Bridge users by country
  • Bridge users by transport
  • Bridge users by country and transport
  • Bridge users by IP version
  • BridgeDB requests by requested transport
  • BridgeDB requests by distributor
  • Top-10 countries by relay users
  • Top-10 countries by possible censorship events
  • Top-10 countries by bridge users
  • “The anonymous Internet”
Bridge users by country graph

This graph shows the estimated number of clients connecting via bridges. These numbers are derived from directory requests counted on bridges. Bridges resolve client IP addresses of incoming directory requests to country codes, so that graphs are available for most countries. For further details check the documentation on Reproducible Metrics.

Download graph as PNG or PDF.

Download data as CSV.

Learn more about the CSV data format or how to reproduce the graph data.

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
2017-07-31 to 2017-08-28 Unknown Directory authorities using 2× bandwidth.
mailing list post for start mailing list post for end post suggesting link to nl, ro, lt, sc increases
2017-07-29 to 2017-08-17 meek Outage of meek-amazon bridge, caused by an expired certificate.
Relay Search expired certificate new certificate
2017-07-07 ipv4 ipv6 geoip and geoip6 databases updated to "July 4 2017 Maxmind GeoLite2 Country" (geoip-db-digest 3D04F191098640F2E03B4D5F7800088D14B7EC30, geoip6-db-digest A3649B9E909C59942FB3D8F874AB4BEA36E8BEC1).
commit
2017-07-04 to 2017-07-21 obfs4 Outage of default obfs4 bridge frosty.
mailing list post
2017-07-04 to 2017-07-21 obfs4 Outage of default obfs4 bridge dragon.
mailing list post
2017-07-02 deb.torproject.org upgrades from tor 0.2.9 to tor 0.3.0
relay versions graph tweet
2017-07-01 United Arab Emirates <OR> Relays Unknown Sudden drop in relay users.
graph
2017-06-26 to 2017-07-02 obfs4 Outage of default obfs4 bridge dragon.
mailing list post
2017-06-26 to 2017-07-03 obfs4 Outage of default obfs4 bridge frosty.
mailing list post
2017-06-20 meek Outage of meek-azure bridge.
start end
2017-06-19 to 2017-06-23 obfs4 Outage of default obfs4 bridge dragon.
mailing list post
2017-06-18 to 2017-06-23 obfs4 Outage of default obfs4 bridge frosty.
mailing list post
2017-06-12 obfs4 Increased the file descriptor limit on default obfs4 bridges ndnop3 and ndnop5 from 4096 to 32768. They had been failing bootstrap attempts from a test location in the U.S. about 40% of the time.
graph showing failed connections
2017-06-09 ipv4 ipv6 geoip and geoip6 databases updated to "June 8 2017 Maxmind GeoLite2 Country" (geoip-db-digest AFD609025B66305AD9FA8E0B15AF4F2BC82271F1, geoip6-db-digest A69FD14ACE46EE695F589ACE0EB7B915285B51B4).
commit
2017-06-07 ipv6 obfs4 Tor Browser 7.0 released. Adds an IPv6 address for default obfs4 bridge Lisbeth. Adds new default obfs4 bridges frosty and dragon.
blog post IPv6 ticket frosty and dragon ticket
2017-05-25 obfs4 Set AssumeReachable 1 on the default obfs4 bridges cymrubridge31 and cymrubridge33 in an attempt to make them publish statistics.
mailing list post
2017-05-23 to 2017-06-13 obfs4 Default obfs4 bridge LeifEricson rejects connections due to a broken firewall forwarding rule. This didn't affect the bridges "real" obfs4 port, but it did affect the port at that time configured in Tor Browser.
2017-05-08 ipv4 ipv6 geoip and geoip6 databases updated to "May 2 2017 Maxmind GeoLite2 Country" (geoip-db-digest B2E5105287668771E34A66F90B34982D419727EF, geoip6-db-digest 8DA8AC3C8158CBFDF7DB53BBF73338246872371A).
commit
2017-05-06 snowflake Set AssumeReachable 1 on the Snowflake bridge 2B280B23E1107BB62ABFC40DDCC8824814F80A72 in an attempt to make it start publishing statistics.
mailing list post
2017-04-30 meek The meek-amazon bridge upgrades to meek-server 0.27.
2017-04-20 meek obfs4 scramblesuit Tor Browser 7.0a3 is released. It changes the app.update.url. It removes the last remaining scramblesuit bridge. It changes the meek-amazon backend. It adds the new default obfs4 bridges cymrubridge31:80 and cymrubridge33:80.
blog post
2017-04-19 meek obfs4 Tor Browser 6.5.2 is released. It changes the app.update.url. It changes the meek-amazon backend. It adds the new default obfs4 bridges cymrubridge31:80 and cymrubridge33:80.
blog post comment about app.update.url
2017-04-14 to 2017-08-20 <OR> Directory authority maatuska's bwscanner stops operating, leading to a drop in traffic on some relays.
tor-consensus-health post about start tor-consensus-health post about end tor-dev thread analysis
2017-04-06 ipv4 ipv6 geoip and geoip6 databases updated to "April 4 2017 Maxmind GeoLite2 Country" (geoip-db-digest 0F3D4A456E5078CC9E49398ADCB04C40EA49B793, geoip6-db-digest 04F41F05FA167EF6EEE3FE953404AB0BCCD33008).
commit
2017-03-22 meek Orbot 15.4.0 beta-2 multi is released, containing the new meek-azure CDN configuration.
mailing list post commit
2017-03-08 ipv4 ipv6 geoip and geoip6 databases updated to "March 7 2017 Maxmind GeoLite2 Country" (geoip-db-digest 63921843E3AAA632088D189D877F836A373CD40D, geoip6-db-digest 2B93B9C6679BB09E1746F212A6DCDC6E710F5F52).
commit
2017-03-07 meek scramblesuit Tor Browser 6.5.1 is released, containing the new meek-azure CDN configuration, and removing the last remaining scramblesuit bridge.
blog post meek ticket scramblesuit ticket
2017-03-03 meek Stopped the (unused) meek-azure CDN endpoint meek-reflect.azureedge.net.
mailing list post
2017-03-03 meek Stopped the meek-azure CDN endpoint az786092.vo.msecnd.net.
mailing list post
2017-03-03 meek Stopped the meek-azure CDN endpoint az668014.vo.msecnd.net.
mailing list post
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
2017-02-12 ipv4 ipv6 geoip and geoip6 databases updated to "February 8 2017 Maxmind GeoLite2 Country" (geoip-db-digest C0C6099CE335916862978F77756C0B42521A74B2, geoip6-db-digest A54B14B9D47584E010F763D3EAE23C4726F4A8D5).
commit
2017-02-10 to present <OR> exit Measurement error from bandwidth authority causes decrease in measured bandwidth in Europe.
mailing list post
2017-02-06 to 2017-08-01 United Arab Emirates obfs3 Unknown Increase in obfs3 users from the UAE, from 5K to 100K. Other transports not affected.
transport graph UAE bridge graph ticket
2017-01-25 to 2017-04-05 webstats Tor Browser update pings roughly halve. The beginning corresponds with the release of Tor Browser 6.5.2, which changed the app.update.url. The end doesn't correspond to any release.
ticket
2017-01-24 Tor Browser 6.5 is released. It changes the app.update.url, which causes an apparent drop in update pings.
blog post graph ticket comment about app.update.url
2017-01-24 snowflake Tor Browser 7.0a1 released, including Snowflake for GNU/Linux only.
blog post
2017-01-22 meek 1.0-beta release of GAEuploader, a tool that automates the setting up of meek.
mailing list post
2017-01-15 to 2017-03-01 United Arab Emirates <OR> Relays Unknown Huge spike in relay users (400k+). An anonymous contributor suggests that it may be a botnet, based on the large number of hosts with an open SMB port in the UAE.
graph metrics-team thread Reddit thread comment about botnet
2017-01-09 meek Decreased the rate limit on the meek-azure bridge to 2.0 MB/s, from 3.0 MB/s.
2017-01-04 ipv4 ipv6 geoip and geoip6 databases updated to "January 4 2017 Maxmind GeoLite2 Country" (geoip-db-digest 672C29A4FA9BF81DE97CFE128741445E2BDE8097, geoip6-db-digest 81F380639A8E1000539204949A363FD3BFAFBA74).
commit

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This material is supported in part by the National Science Foundation under Grant No. CNS-0959138. Any opinions, finding, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. "Tor" and the "Onion Logo" are registered trademarks of The Tor Project, Inc.. Data on this site is freely available under a CC0 no copyright declaration: To the extent possible under law, the Tor Project has waived all copyright and related or neighboring rights in the data. Graphs are licensed under a Creative Commons Attribution 3.0 United States License.