[tor-bugs] #20216 [Metrics/Censorship analysis]: Iran blocking of vanilla and obfs3, 2016-08 and 2016-09
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Thu Sep 22 02:19:59 UTC 2016
#20216: Iran blocking of vanilla and obfs3, 2016-08 and 2016-09
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Reporter: dcf | Owner:
Type: defect | Status: new
Priority: Medium | Milestone:
Component: Metrics/Censorship analysis | Version:
Severity: Normal | Keywords: censorship
| block
Actual Points: | Parent ID:
Points: | Reviewer:
Sponsor: |
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Direct users in Iran dropped from 8,000 to 2,000 between 2016-08-20 and
2016-08-23. The numbers recovered to 4,000, then crashed to 400 on
2016-09-03 and 2016-09-04.
[[Image(userstats-relay-country-ir-2016-06-24-2016-09-22-off.png)]]
[https://metrics.torproject.org/userstats-relay-
country.html?start=2016-06-24&end=2016-09-22&country=ir&events=off link]
Looking at bridge users, there is an increase right around 2016-08-20, the
time of the first blocking, then an abrupt return to previous levels
around 2016-09-03, the time of the second blocking.
[[Image(userstats-bridge-combined-ir-2016-06-24-2016-09-22.png)]]
[https://metrics.torproject.org/userstats-bridge-
country.html?start=2016-06-24&end=2016-09-22&country=ir link]
Looking at the graph of bridge users by transport, obfs4 continued working
while obfs3 and vanilla were blocked.
[[Image(userstats-bridge-country-ir-2016-06-24-2016-09-22.png)]]
[https://metrics.torproject.org/userstats-bridge-
combined.html?start=2016-06-24&end=2016-09-22&country=ir link]
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20216>
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