[metrics-bugs] #18342 [Metrics/Onionoo]: Provide more accurate reverse DNS results

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#18342: Provide more accurate reverse DNS results
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 Reporter:  cypherpunks      |          Owner:  metrics-team
     Type:  defect           |         Status:  assigned
 Priority:  Medium           |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  metrics-2018     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Comment (by irl):

 Java does indeed check to see that there is an A record that matches the
 PTR record when using InetAddress.getHostName().

 The following would allow us to perform this "manually":
 https://docs.oracle.com/javase/8/docs/technotes/guides/jndi/jndi-dns.html

 We could then flag whether or not the A record matched and return this
 information along with it.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18342#comment:12>
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