[tor-bugs] #16971 [Tor]: Testing tor networks use external DNS

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#16971: Testing tor networks use external DNS
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 Reporter:  teor                             |          Owner:
     Type:  defect                           |         Status:  new
 Priority:  major                            |      Milestone:  Tor:
Component:  Tor                              |  0.2.7.x-final
 Keywords:  Post027Freeze TorCoreTeam201509  |        Version:  Tor:
Parent ID:                                   |  0.2.7.2-alpha
                                             |  Actual Points:
                                             |         Points:
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 When I launch a test network using `make test-network` / chutney on OS X,
 and leave it running for about a minute, one of the tor processes makes
 DNS calls.

 I discovered this because LittleSnitch told me tor was trying to connect
 to the local network's DNS server. I don't know where this happens in the
 tor code.

 Marking this as major / Post027Freeze as it could be an information leak.
 Alternately, it could be an attempt to look up an address that chutney is
 (mis)configuring for tor.

 I'm not quite sure how to tell the difference between an information leak
 and a misconfiguration, it may take me some time.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16971>
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