[tor-bugs] #2541 [Metrics]: Prepare metrics for IPv6

["Tor Bug Tracker & Wiki" <torproject-admin@xxxxxxxxxxxxxx>]

#2541: Prepare metrics for IPv6
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  Reporter:  karsten  |              Owner:  karsten
      Type:  task     |             Status:  new    
  Priority:  normal   |          Milestone:         
 Component:  Metrics  |            Version:         
  Keywords:           |             Parent:         
    Points:           |   Actualpointsdone:         
Pointsdone:           |       Actualpoints:         
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 Rumours came up that IPv4 addresses are out and we should prepare for
 IPv6.  Here's an initial (and probably incomplete) list of metrics parts
 that currently rely on Tor being IPv4-only:

  - Tor, geoip database:  Directory mirrors count directory requests and
 resolve the connecting IP addresses to country codes.  We use Maxmind's
 IPv4-based geoip database for this task.  Part of the IPv6 integration
 involves comparing Maxmind's IPv6 database to other databases.
  - metrics-db, bridge descriptor sanitizer:  We remove all sensitive
 information from bridge descriptors before publishing them.  As part of
 this process we replace IP addresses with a cryptographic hash value based
 on the original IP address.  We'll have to think about whether we can
 simply extend this algorithm, or if that reveals too much about our
 bridges.
  - metrics-web, relay search:  Our relay search supports lookups by IPv4
 address which needs to be extended.  It's unclear how well IPv6 is
 supported by PostgreSQL and by our database schema in particular.
  - !ExoneraTor:  We have a web page, a Java application, and a Python
 script that allow looking up whether an IP address was registered as relay
 in the Tor network at a given time.
  - !VisiTor:  We have a Java application and a Python script to parse web
 server logs to find out what fraction of requests came from Tor users.
  - Exit lists:  We need a new exit list format with IPv6 support for
 !VisiTor and maybe in the future for !ExoneraTor, too.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2541>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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