[tor-bugs] #24014 [Core Tor/Tor]: Make exits check DNS periodically, and disable exit traffic if it fails

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#24014: Make exits check DNS periodically, and disable exit traffic if it fails
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 Reporter:  teor                                 |          Owner:  (none)
     Type:  enhancement                          |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-performance, tbb-usability,      |  Actual Points:
  performance, tbb-needs, 034-triage-20180328,   |
  034-removed-20180328                           |
Parent ID:                                       |         Points:  1
 Reviewer:                                       |        Sponsor:
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Comment (by starlight):

 Duplicate ticket #32828 was opened on 2019/12/20 more than two years after
 this one--so much times has passed this was forgotten:

 >Large numbers of exit relays with 100% DNS failure rates frequently
 appear on ​https://arthuredelstein.net/exits/, which by itself has proven
 insufficient motivation for exit operators to assure functional DNS.
 Enhance tor daemon to automatically disable the exit policy and fallback
 to not-exit operation when DNS failure rates exceed a threshold for a
 time.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24014#comment:12>
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