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[tor-bugs] #13924 [Tor]: Reachability testing and channel is_local assume DirAllowPrivateAddresses is 0



#13924: Reachability testing and channel is_local assume DirAllowPrivateAddresses
is 0
-----------------------+------------------------------------
 Reporter:  teor       |          Owner:
     Type:  defect     |         Status:  new
 Priority:  normal     |      Milestone:
Component:  Tor        |        Version:  Tor: 0.2.6.1-alpha
 Keywords:  tor-relay  |  Actual Points:
Parent ID:  #13718     |         Points:
-----------------------+------------------------------------
 Split from #13718.

 The way tor determines reachability is broken for test, internal, and
 local networks.

 When we set is_local on a channel, we assume DirAllowPrivateAddresses is
 0.

 I'm working on a patch that, when we're on a local address and
 DirAllowPrivateAddresses is 1, then checks whether we're connecting to our
 own digest, or another router's.

 When we don't (yet) have this information (e.g. a reverse proxied
 connection), I think it's safer to assume local, and defer confirmation of
 reachability until we know who is at the other end. (This is no worse than
 the current behaviour.)

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13924>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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