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Re: [tor-bugs] #5940 [Core Tor/Tor]: Figure out own IPv6 address

#5940: Figure out own IPv6 address
-------------------------------------------------+-------------------------
 Reporter:  ln5                                  |          Owner:
     Type:  enhancement                          |         Status:
                                                 |  assigned
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.2.???
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ipv6, tor-relay, 026-triaged-1,      |  Actual Points:
  026-deferrable, lorax, 027-triaged-1-out       |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 If we turned on IPv6 autodetection by default, operators with broken IPv6
 configs might find their relays being excluded from the consensus because
 they are unreachable on IPv6.

 We'd have to teach Tor to test IPv6 reachability, and stop advertising
 IPv6 if it was unreachable.

 But this is counted as an address change by OnionOO, so it has flow-on
 effects in systems that analyse relay stability.

 And there are race conditions involved - this is why we made IPv4 DirPort
 reachability a requirement in 0.2.8 in #18050.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5940#comment:21>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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