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 in the metrics-timeline Git repository 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|
Provisionally increased memory limits of the fallback snowflake proxies to 400 MB, 800 MB, or unlimited.
Increased memory limit of the fallback snowflake proxies from 200 MB to 400 MB.
Disabled periodic restarts of the fallback snowflake proxies; gave them a memory limit of 200 MB.
|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
|2015-12-31 to 2020-06-04||Mexico||
The Telmex ISP in Mexico blocks seven directory authorities.
mailing list post article
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.