[tor-bugs] #31290 [Core Tor/Tor]: provide DNS health metrics for tor exit relay operators
Tor Bug Tracker & Wiki
blackhole at torproject.org
Tue Jul 30 15:09:29 UTC 2019
#31290: provide DNS health metrics for tor exit relay operators
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Reporter: nusenu | Owner: (none)
Type: enhancement | Status: new
Priority: Medium | Component: Core Tor/Tor
Version: | Severity: Normal
Keywords: | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
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https://lists.torproject.org/pipermail/tor-dev/2019-February/013655.html
every now and then I'm in contact with relay operators
about the "health" of their relays.
Following these 1:1 discussions and the discussion on tor-relays@
I'd like to rise this issue with you (the developers) with the goal
to help improve relay operations and end user experience in the long term:
Current situation:
Arthur Edelstein provides public measurements to tor exit relay operators
via
his page at: https://arthuredelstein.net/exits/
This page is updated once daily.
the process to use that data looks like this:
- first they watch Arthur's measurement results
- if their failure rate is non-zero they try to tweak/improve/change their
setup
- wait for another 24 hours (next measurement)
This is a somewhat suboptimal and slow feedback loop and is probably also
less accurate and less valuable data when compared to the data the tor
process can provide.
Suggestion for improvement:
Exposes the following DNS status information
via tor's controlport to help debug and detect DNS issues on exit relays:
(total numbers since startup)
- amount of DNS queries send to the resolver
- amount of DNS queries send to the resolver due to a RESOLVE request
- DNS queries send to resolver due to a reverse RESOLVE request
- amount of queries that did not result in any answer from the resolver
- breakdown of number of responses by response code (RCODE)
https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-
parameters-6
- max amount of DNS queries send per curcuit
If this causes a significant performance impact this feature should be
disabled
by default.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31290>
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