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.
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 |
---|---|---|
2022-02-18 | snowflake |
Outage of the Snowflake bridge.
mailing list post |
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 |
2022-01-28 | 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 a temporary load-balanced staging server. Debugged connection problems until 2022-01-25 18:47:00.
issue comment post comment |
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 |
2021-11-17 to 2022-02-02 | obfs4 |
Run a Tor Bridge campaign, offers rewards for running obfs4 bridges.
blog post about start blog post about end |
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