[tor-bugs] #30870 [Applications/Orbot]: Default obfs4 bridges are all offline

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#30870: Default obfs4 bridges are all offline
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 Reporter:  phw                 |          Owner:  n8fr8
     Type:  defect              |         Status:  needs_information
 Priority:  Medium              |      Milestone:
Component:  Applications/Orbot  |        Version:
 Severity:  Normal              |     Resolution:
 Keywords:  tbb-bridges         |  Actual Points:
Parent ID:                      |         Points:
 Reviewer:                      |        Sponsor:
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Comment (by phw):

 Replying to [comment:5 n8fr8]:
 > Why is it so hard to keep good obfs4 bridges online? It is frustrating
 that we have to keep changing these.
 [[br]]
 The last few disappeared because 1) one operator's server contract
 expired, 2) another operator wanted to reduce his maintenance burden, and
 3) several default bridges disappeared without anyone noticing, so we
 removed them.
 [[br]]
 > I am not even talking about "unblocked in China", I just mean reliably
 running. What is the expected life time of an obfs4 bridge?
 [[br]]
 The longer, the better. We are in touch with a bunch of research groups
 who are interested in setting up a default bridge (e.g., #31164).
 Hopefully, this will result in several new and long-lived bridges.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30870#comment:6>
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