[tor-bugs] #21989 [Core Tor/Tor]: Should we tell Exits to reject all traffic if DNS fails?

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#21989: Should we tell Exits to reject all traffic if DNS fails?
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  (none)
     Type:  enhancement                          |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  dns, tor-exit, reliability self-     |  Actual Points:
  test                                           |
Parent ID:                                       |         Points:  1
 Reviewer:                                       |        Sponsor:
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Comment (by cypherpunks):

 If i pass traffic to a
 {{{
  SocksPort     IPv4Traffic IPv6Traffic OnionTraffic NoDNSRequest
 }}}
 user can expect still use this relay? they are still providing rare exit
 bandwidth. make use of it as far as possible?

 client needs somehow know, the exit cant resolve dns. so that it does not
 choose to attach a stream with hostname to it. just like it checks
 exitpolicy to see if it would with usually  Support connection target
 address:port

 it would be nice to mark this exit as BadDNS or something. to let client
 know, not to choose it while using hostname targets. but in any other
 case.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21989#comment:11>
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