[tor-bugs] #30350 [Obfuscation/Snowflake]: Hello, in China, currently, Tor Browser 8.5a11 version can't connect to Tor network through Snowflake bridge.

[Tor Bug Tracker & Wiki]

#30350: Hello, in China, currently, Tor Browser 8.5a11 version can't connect to Tor
network through Snowflake bridge.
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 Reporter:  amiableclarity2011     |          Owner:  cohosh
     Type:  defect                 |         Status:  accepted
 Priority:  Medium                 |      Milestone:
Component:  Obfuscation/Snowflake  |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:                         |  Actual Points:
Parent ID:                         |         Points:
 Reviewer:                         |        Sponsor:
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Comment (by dcf):

 Replying to [comment:12 amiableclarity2011]:
 > This evening, my connection to Tor network through Snowflake bridge was
 terminated within 40 minutes.

 Do you mean that it was working for 40 minutes, then it stopped working?

 What if you try again, does it work sometimes?

 > Obviously China's firewall can recognize the characteristic of the
 traffic which flows to Snowflake proxies and automatically block the
 Snowflake proxies that I use.

 Not necessarily. Another explanation is the the firewall has only blocked
 the IP address of one of the proxies. When you use Snowflake, you are
 assigned one of the available proxies randomly. As you browse, your proxy
 might change. It may be, that after 40 minutes you were assigned the proxy
 whose IP address is blocked.

 We are working on changes to reduce the problem of being assigned a
 blocked proxy: #20813, #25723.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30350#comment:13>
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