[tor-bugs] #20996 [Core Tor/Tor]: IPv6-only client fails to bootstrap on microdescriptor fetch/fallback

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#20996: IPv6-only client fails to bootstrap on microdescriptor fetch/fallback
---------------------------+------------------------------------
 Reporter:  mtigas         |          Owner:
     Type:  defect         |         Status:  needs_review
 Priority:  High           |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor   |        Version:  Tor: 0.2.8.5-rc
 Severity:  Normal         |     Resolution:
 Keywords:  ipv6 fallback  |  Actual Points:
Parent ID:                 |         Points:  0.5
 Reviewer:                 |        Sponsor:
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Comment (by teor):

 Replying to [comment:3 mtigas]:
 > @teor
 >
 > Yep! After a quick test, seems like your branch
 <https://github.com/teor2345/tor/tree/ipv6-only-client> seems to work
 perfectly under T-Mobile’s IPv6/NAT64-only network conditions. Just had to
 set "ClientUseIPv4 0" + "ClientUseIPv6 1"; didn’t need to touch
 "UseMicrodescriptors" at all.

 @mtigas,

 It should work with just `ClientUseIPv4 0` (tor assumes that if you turn
 off IPv4, you want IPv6).

 I also wonder if it works with just `ClientPreferIPv6ORPort 1`, I think it
 should, but if it doesn't, we should open a separate ticket for that.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20996#comment:4>
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