[tor-bugs] #30477 [Core Tor/Tor]: Tor should self-test reachability of TCP listeners exposed by PT's

[Tor Bug Tracker & Wiki]

#30477: Tor should self-test reachability of TCP listeners exposed by PT's
-------------------------------------------------+-------------------------
 Reporter:  ahf                                  |          Owner:  (none)
     Type:  task                                 |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  unspecified
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-pt, network-team-roadmap-        |  Actual Points:
  november                                       |
Parent ID:  #30471                               |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor30-must
-------------------------------------------------+-------------------------

Comment (by phw):

 Replying to [comment:7 teor]:
 > It wouldn't be that hard to teach Tor bridges to self-test their PT
 addresses via an Exit, like we already do with DirPorts. As a bonus step,
 we might even want to test that the port speaks the PT protocol.
 [[br]]
 This sounds great because it's consistent with how a bridge's vanilla port
 is tested and the sooner we can tell an operator that something's wrong,
 the better. The bonus step is helpful in some edge cases: we recently had
 a bridge with an open obfs4 port but obfs4 connections failed. It turned
 out that obfs4proxy was unable to talk to tor because a local security
 policy prevented obfs4proxy from connecting to the ExtORPort.

 The only downside I see is that it won't work for a UDP-based transport –
 if we ever end up deploying one.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30477#comment:8>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online