[tor-bugs] #13953 [Core Tor/Tor]: Self-test reachability test - Listen address from ORPort is ignored, it uses default address unless specified via Address argument

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#13953: Self-test reachability test - Listen address from ORPort is ignored, it
uses default address unless specified via Address argument
--------------------------+------------------------------------
 Reporter:  s7r           |          Owner:  teor
     Type:  enhancement   |         Status:  needs_review
 Priority:  Medium        |      Milestone:  Tor: 0.2.9.x-final
Component:  Core Tor/Tor  |        Version:  Tor: 0.2.5.10
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:  3 hours
Parent ID:  #17782        |         Points:  3
 Reviewer:                |        Sponsor:
--------------------------+------------------------------------

Comment (by s7r):

 tested teor's branch and it works in practice. Behind NAT it is not a
 problem, because Tor guesses the public IP address and does the test on
 that address regardless if it's not configured with `NoListen`.

 It becomes a problem when there are multiple '''public''' IP addresses on
 the same server, because Tor will only check the primary (default) address
 unless differently configured with `Address`. That is why I suggest
 changing the second part of the log message to be more explicit. Something
 like:
 {{{
 Please configure the matching IPv4 address for this router as "Address
 <IPv4 address>" in the torrc configuration file if you have multiple
 public IP addresses. If you are behind a NAT and have the right ports
 forwarded you can ignore this warning or, to remove it, use 2 ORPort lines
 with options NoListen (for the public IPv4 address line) and NoAdvertise
 (for the internal NAT IPv4 address line).
 }}}

 The rest looks good to me.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13953#comment:23>
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