[tor-bugs] #26646 [Core Tor/Tor]: add support for multiple OutboundBindAddressExit IP(ranges)

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Mar 9 01:29:45 UTC 2020


#26646: add support for multiple OutboundBindAddressExit IP(ranges)
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 Reporter:  nusenu                               |          Owner:  (none)
     Type:  enhancement                          |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  needs-proposal, tor-exit, ipv6,      |  Actual Points:
  censorship                                     |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by teor):

 Yes, a short proposal would be helpful.

 I'd like to see a sketch of the design:
 * how are the ranges specified in the torrc
 * how does the exit decide when to use a new IP
 * how are the new IPs chosen from the range

 And also a discussion of the risks:
 * clients use the same circuit and exit for the same website, because some
 broken websites expect the same user to have the same IP for different
 connections
   * do clients deliberately use the same exit through different circuits?
 I don't think so, but I'm not sure
 * some circuits can be distinguished, because they come from different IP
 addresses
 * does the new syntax also apply to outbound OR connections?
   * if relays use a different address to their published address for
 directory requests, authorities may refuse those requests
   * relays try to keep canonical connections open with other relays, and
 different addresses make them rotate connections faster

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26646#comment:6>
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