[tor-bugs] #32588 [Core Tor/Tor]: Setting ORPort [ipv6]:auto mistakenly advertises port 94

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#32588: Setting ORPort [ipv6]:auto mistakenly advertises port 94
------------------------------+--------------------------
     Reporter:  arma          |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:  Tor: 0.4.1.6
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------------
 Start your Tor with
 {{{
 ORPort 9001
 ORPort [2a01:238:43e4:2b00:ae5a:a980:1f63:cc5e]:auto nolisten
 DirPort 9030
 }}}
 and let it start up. Then go to http://127.0.0.1/tor/server/authority and
 check out how it has the line
 {{{
 or-address [2a01:238:43e4:2b00:ae5a:a980:1f63:cc5e]:94
 }}}

 First: How did it pick that number? It's a weird choice for a port.

 Second: If this is actually your ipv6 address, you can leave out the
 nolisten, and that's where things get interesting. Your logs will say
 something like
 {{{
 Nov 24 01:53:42 v4 tor[10988]: Nov 24 01:53:42.001 [notice] Opening OR
 listener on [2a01:238:43e4:2b00:ae5a:a980:1f63:cc5e]:0
 Nov 24 01:53:42 v4 tor[10988]: Nov 24 01:53:42.002 [notice] Opened OR
 listener on [2a01:238:43e4:2b00:ae5a:a980:1f63:cc5e]:41535
 }}}

 but then your descriptor will still say :94.

 This is happening right now to relay "Testbit": they have set :auto for
 their ipv6 address in their ORPort, they get the above line about how it's
 opened on port 41535, and yet their descriptor says it's on port 94.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32588>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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