[tor-bugs] #29277 [Obfuscation/Pluggable transport]: Look into getting default Tor bridges scanned by external reachability tests

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#29277: Look into getting default Tor bridges scanned by external reachability
tests
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 Reporter:  cohosh                           |          Owner:  (none)
     Type:  task                             |         Status:  new
 Priority:  Medium                           |      Milestone:
Component:  Obfuscation/Pluggable transport  |        Version:
 Severity:  Normal                           |     Resolution:
 Keywords:                                   |  Actual Points:
Parent ID:                                   |         Points:
 Reviewer:                                   |        Sponsor:  Sponsor19
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Comment (by phw):

 Today, Roya visited as during our weekly anti-censorship team meeting and
 we briefly touched based on getting reachability scans going. David
 pointed out that OONI's list of [https://github.com/OpenObservatory/ooni-
 resources/blob/master/bridge_reachability/tor-bridges-ip-port.csv default
 bridges (among other things)] would be a great way to get started.

 Roya's system has ~50,000 vantage points in 42 "non-free countries"
 (according to Freedom House's definition) plus a sample of other
 countries. Roya also wanted to know how often we want these measurements
 run.  "At least once a day" seems like a good answer for now.

 For now, I think we should:
 1. Get an initial scan going, and see what we can learn from it.
 2. Compare the scan results to OONI's data and hope that both systems
 agree.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29277#comment:7>
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