[tor-bugs] #28463 [Core Tor/sbws]: Measure exits as non-exits with 50% probability

[Tor Bug Tracker & Wiki]

#28463: Measure exits as non-exits with 50% probability
---------------------------+-----------------------------------
 Reporter:  teor           |          Owner:  (none)
     Type:  defect         |         Status:  new
 Priority:  Medium         |      Milestone:  sbws: unspecified
Component:  Core Tor/sbws  |        Version:
 Severity:  Normal         |     Resolution:
 Keywords:                 |  Actual Points:
Parent ID:                 |         Points:
 Reviewer:                 |        Sponsor:
---------------------------+-----------------------------------

Comment (by teor):

 Replying to [comment:8 juga]:
 > A reason why an exit might always fail to be measured is when it
 retrieves the data from a CDN, the local resolver returns an IPv6 address,
 and the exit can exit to an IPv6 address (commented also in #16559).

 Do you mean "the exit can't exit to an IPv6 address"?

 Most IPv6 sites return an IPv4 and an IPv6 address in DNS.
 But if the client asks for IPv6, the exit will try to use it.
 But tor clients asks for IPv4 by default.

 Does sbws set PreferIPv6 on its SOCKSPort?

 > Maybe the opposite could happen?.

 I'm not sure what you mean by "the opposite".
 Can you explain?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28463#comment:9>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online