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 see these questions and answers about user statistics.
The following events have been manually collected on this wiki page and might be related to the displayed graph.
The manually collected events in this table do not necessarily match the automatically generated possible censorship events shown in the graph.
|Dates||Places/Protocols||Description and Links|
|2017-12-12 to 2018-01-18||meek||
Outage of the meek.bamsoftware.com (unthrottled for public use), meek.bamsoftware.com:7443 (former meek-azure, now unused), and gaeuploader.meek.bamsoftware.com (used by GAEuploader) bridges.
|2017-12-12 to 2018-01-10||France <OR> Relays Unknown||
Temporary tripling of relay users in France. Bridges not affected.
|2017-12-10 to 2018-02-01||Germany <OR> Relays Unknown||
Further, slow increase of relay users in Germany, from 500k to over 1.5M.
graph reddit thread ticket
|2017-12-09||<OR> ipv6 Relays||
Release of Tor Browser 7.0.11, containing tor 0.3.1.9, which adds an IPv6 address for the bridge authority bastet.
|2017-12-09||<OR> ipv6 Relays||
Release of Tor Browser 7.5a9, containing tor 0.3.2.6-alpha, which adds an IPv6 address for the bridge authority bastet.
|2017-12-08 to 2017-12-11||Bridges||
The bridge authority was down for unknown reasons.
graph mailing list post
|2017-12-05 to 2017-12-15||Zimbabwe||
Internet outage in Zimbabwe.
|2017-12-04 to present||
DDoS attack creates load on the network.
tor-relays thread relay graph summary post ticket
|2017-12-01||<OR> ipv6 Relays||
Release of tor 0.2.8.17, 0.2.9.14, 0.3.0.13, 0.3.1.9, and 0.3.2.6-alpha, which add an IPv6 address for the bridge authority bastet.
ticket blog post
|2017-10-07 to 2017-12-20||Romania <OR> Relays Unknown||
Surge of relay users in Romania, from 10k to around 90k, which later subsided.
graph metrics-team thread
|2017-06-07 to 2017-12-14||Brazil meek Unknown||
Sustained increase of meek users in Brazil, similar to the one that took place between 2016-07-21 and 2017-03-03.
|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
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.