wiki:doc/MetricsTimeline

Version 95 (modified by dcf, 18 months ago) (diff)

Today's brief meek-azure bridge outage.

An incomplete timeline of events that might affect user metrics, to aid in the interpretation of data and graphs from https://metrics.torproject.org/.

Other data sources:

start date end date place protocols description links
2011-01-25 <OR> Release of tor 0.2.2.22-alpha. Changes the TLS Diffie–Hellman parameter to match that used by Apache mod_ssl, to evade blocking in Iran. censorshipwiki entry tor TLSHistory
2011-09-13 <OR> Release of tor 0.2.3.4-alpha. Changes the expiration time of TLS certificates, to evade blocking in Iran. ticket censorshipwiki entry
2012-03-01 2013-08-19 kz <OR> Kazakhstan blocks Tor TLS by ClientHello and ServerHello fingerprints. ticket tor patches
~2012-05-15 ~2012-12-15 et <OR> Ethiopia blocks Tor TLS. ticket blog post 1 blog post 2 sample packets tor patches
2012-06-15 <OR> Release of tor 0.2.3.17-beta. Changes the TLS ciphersuite list to match that of Firefox 8, to evade blocking by China. ticket censorshipwiki entry
2013-08-19 ~2014-04-28 <OR> relay Relay users increase globally from about 800K to over 5M, when computers in the Mevade/Sefnit botnet began using Tor to communicate. The user count decreased in the following months through efforts to clean up the botnet. Sometime in 2014-04, the botnet switched from using Tor to using SSH. blog post tech report analysis switch to SSH
2013-10-27 <OR> relay Microsoft adds the Mevade/Sefnit botnet signature to various security scanners. blog post
2013-11-03 <OR> relay Microsoft adds the Mevade/Sefnit botnet signature to their Malicious Software Removal Tool. blog post
2015-11-18 2015-12-10 bd <OR> obfs3 obfs4 Bangladesh blocks Facebook, WhatsApp, and Viber. news article (archive) relay graph
2016-04-28 fte Tor Browser 6.0a5 and 6.0a5-hardened released, which lacks the fte pluggable transport on Mac. 6.0a5 blog post 6.0a5-hardened blog post ticket
2016-05-30 fte Tor Browser 6.0 released, which lacks the fte pluggable transport on Mac. 6.0 blog post ticket
2016-05-02 2016-05-03 br <OR> WhatsApp block in Brazil blog post OONI report bloqueios report
2016-06-01 kz <OR> obfs4 Kazakhstan blocks vanilla Tor TLS. Users mostly switch to obfs4. ticket
2016-08-20 ir <OR> Iran somehow blocks most direct Tor connections. May also affect bridge users, but it's hard to tell because there were few vanilla bridge users anyway. ticket
2016-08-24 bridge tor 0.2.8.7 and 0.2.9.2-alpha are released, changing the bridge authority from Tonga to Bifroest. 0.2.8.7 announcement
2016-08-31 bridge CollecTor begins publishing bridge stats from the new bridge authority Bifroest. post
2016-09-02 bridge The former bridge authority Tonga shuts down. Bridges that have not updated to tor 0.2.8.7 or 0.2.9.2-alpha (which include all 5 default obfs3 bridges and 3/16 default obfs4 bridges) stop reporting statistics. shutdown notice blog post loss of reporting bridges
2016-09-04 ir <OR> Iran intensifies the blocking begun on 2016-08-20, getting most of the remaining direct users. There is interference in the graphs from the bridge authority changeover on 2016-09-02, but because the changeover would not have affected counts of direct users, it may be a coincidence. ticket
2016-09-20 meek macOS 10.12 (Sierra) is released, breaking some programs that are built with Go <1.7, including the meek-client that comes with Tor Browser. (See 2016-11-15 unbreaking event.) ticket
2016-09-23 obfs3 Default obfs3 bridges ndnop0 and ndnop2 upgrade and begin reporting statistics to the new bridge authority Bifroest. post on bridges not reporting statistics
2016-09-23 obfs4 Default obfs3 bridges ndnop3 and ndnop5 upgrade and begin reporting statistics to the new bridge authority Bifroest. post on bridges not reporting statistics
2016-09-23 obfs3 Default obfs3 bridges "Unnamed" and "Unnamed" (fingerprint AF9F66B7B04F8FF6F32D455F05135250A16543C9) upgrade and begin reporting statistics to the new bridge authority Bifroest.
2016-09-24 obfs3 Default obfs3 bridge LeifEricson upgrades and begins reporting statistics to the new bridge authority Bifroest. This is the last obfs3 bridge that hadn't upgraded.
2016-09-24 obfs4 Default obfs4 bridge LeifEricson upgrades and begins reporting statistics to the new bridge authority Bifroest. This is the last obfs4 bridge that hadn't upgraded.
2016-10-02 2016-10-03 eg <OR> relay Reports that direct connections from Egypt are blocked; bridges are required. Maybe be the same as the block beginning 2016-10-25. OONI report
2016-10-08 et Ethiopia declares a state of emergency and implements network blocks. OONI report
2016-10-08 2016-10-09 tr Turkey blocks storage services including Dropbox, Google Drive, OneDrive, and GitHub. Most (all?) of the blocks were rescinded the next day. blocking article unblocking tweet unblocking article
2016-10-19 2016-11-10 meek Large decrease in meek users, perhaps caused by problems in Orbot 15.0.2 BETA 1 that were fixed in Orbot 15.2.0 RC8. ticket initial email followup email Orbot mail
2016-10-25 eg <OR> relay Egypt blocks Tor directory authorities and public relays by TCP RST. Bridges work. OONI report
2016-11-03 tr Turkey blocks Facebook, Twitter, YouTube, WhatsApp article
2016-11-04 tr Turkey orders a block on VPN services and Tor Turkish article English article ticket
2016-11-15 meek Tor Browser 6.0.6 is released, unbreaking meek on macOS 10.12 (Sierra). (See 2016-09-20 breaking event.) blog post ticket
2016-11-15 obfs4 Default obfs4 bridges ndnop3 and ndnop5 turn on timing obfuscation (iat-mode). mailing list post ticket
2016-11-18 obfs4 Default obfs4 bridge Lisbeth turns on timing obfuscation (iat-mode=1). ticket
~2016-09-23 2016-11-28 obfs3 Outage of default obfs3 bridges "Unnamed" and "Unnamed" (fingerprint AF9F66B7B04F8FF6F32D455F05135250A16543C9). (Start date not known for sure, though it must have been after 2016-09-23; discussed in non-archived tor-team email.)
2016-11-30 20:00:00 2016-12-02 12:00:00 gm Internet shutdown in Gambia. relay graph OONI report Cloudflare blog post
2016-12-01 by <OR> relay Belarus blocks the addresses of public Tor relays, apparently by RST injection. Bridges work, even unobfuscated ones. ticket article (Russian) OONI blog post
2016-12-12 tr <OR> Turkey blocks direct Tor connections. The order to block had come on 2016-11-04. ticket tweet article
2016-12-15 cd The Democratic Republic of the Congo orders a block of social media services. article relay graph bridge graph
~2017-02-10 <OR> exit Measurement error from bandwidth authority causes decrease in measured bandwidth in Europe. mailing list post
2017-03-03 meek meek-azure is shut down pending migration to a new CDN configuration. mailing list post
2017-03-07 18:32:11 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
2017-03-22 meek Orbot 15.4.0 beta-2 multi is released, containing the new meek-azure CDN configuration. mailing list post commit
2017-04-14 <OR> Directory authority maatuska's bwscanner stops operating, leading to a drop in traffic on some relays. tor-consensus-health post tor-dev thread
2017-05-06 16:20:00 snowflake Set AssumeReachable 1 on the Snowflake bridge 2B280B23E1107BB62ABFC40DDCC8824814F80A72 in an attempt to make it start publishing statistics. mailing list post
2017-05-16 ua Ukraine blocks Russian-operated web services. Relay and bridge users increase over 5×. May be partly attributable to the FreeU Browser , a browser produced and advertised by Mail.ru that includes a tor client. ticket news article reddit post relay graph bridge graph news article on FreeU
2017-05-22 Unusually slow OnionPerf measurements. metrics-team thread
2017-05-23 07:00:00 2017-06-13 19:20:00 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.
2017-05-25 obfs4 Set AssumeReachable 1 on the default obfs4 bridges cymrubridge31 and cymrubridge33 in an attempt to make them publish statistics. mailing list post
2016-06-12 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
2017-06-20 00:09:50 2017-06-20 00:32:21 meek Outage of meek-azure bridge. start end

Unknown

It looks like something happened, but we don't know what. If you know, fill in the missing details and move it into the table above.

start date end date place protocols description links
2016-02-24 tm <OR> Large drop in direct users in Turkmenistan. graph
2016-07-21 2017-03-03 br meek Sustained increase in meek users in Brazil. Locals believe that they are not actual users, rather bots or something like that. End date coincides with shutdown of meek-azure before migration. graph
2016-08-24 cn <OR> Large decrease in users in China. relay bridge
2016-10-09 2016-10-25 il <OR> relay Direct users fluctuate wildly in Israel. Bridge users not affected. graph
2016-11-20 sa <OR> Decrease in direct users and increase in bridge users in Saudi Arabia. ticket
2016-11-20 2016-12-22 sa bridge Decrease in direct users and increase in bridge users in Saudi Arabia. The increase in bridge users lasts only about one month while the number of direct users remains down. ticket
2016-12-21 2016-12-28 <OR> relay Drop in relay users. metrics-team thread thread continues
2017-01-15 ae <OR> relay Huge increase in relay users (200k+). graph metrics-team thread reddit thread
2017-02-06 ae obfs3 Increase in obfs3 users from the UAE, from 5K to 75K. Other transports and countries not affected. transport graph UAE bridge graph ticket
2017-04-05 2017-04-13 il <OR> relay Sudden increase of direct users in Israel. Bridge users not affected. relay graph
2017-04-17 2017-04-23 il <OR> relay Another sudden increase of direct users in Israel. Bridge users not affected. relay graph
2017-04-23 tw <OR> relay Direct users fluctuate widely in Taiwan after a 3× sudden increase. tor-talk post graph
2017-05-09 2017-05-12 mo <OR> relay Sudden temporary peak of 3k direct users in Macau. tor-talk post graph
2017-05-10 eg <OR> relay Drop in direct users from Egypt. tor-talk post graph