[tor-bugs] #29570 [Core Tor/Tor]: Enforce mutually exclusive logic for IPv6 ORPort flags

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#29570: Enforce mutually exclusive logic for IPv6 ORPort flags
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 Reporter:  s7r                            |          Owner:  (none)
     Type:  defect                         |         Status:  new
 Priority:  Medium                         |      Milestone:  Tor:
                                           |  unspecified
Component:  Core Tor/Tor                   |        Version:  Tor:
                                           |  unspecified
 Severity:  Normal                         |     Resolution:
 Keywords:  tor-relay, ipv6, reachability  |  Actual Points:
Parent ID:                                 |         Points:
 Reviewer:                                 |        Sponsor:
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Comment (by s7r):

 The right solution to achieve such tunneled / encapsulated setups is to
 have another torrc parameter `Advertise6to4OrportAddress <IPv6
 address>:<port>` that will tell Tor to include this IPv6 address in the
 descriptor without binding to any IPv6 address because traffic to that
 IPv6 address : port is translated to v4 and forwarded to the IPv4 ORPort.
 At least this is the way it would make sense to me, but more opinions
 required here.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29570#comment:7>
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