[tor-bugs] #24902 [Core Tor/Tor]: Denial of Service mitigation subsystem

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#24902: Denial of Service mitigation subsystem
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 Reporter:  dgoulet                              |          Owner:  dgoulet
     Type:  enhancement                          |         Status:
                                                 |  needs_review
 Priority:  Very High                            |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ddos, tor-relay, review-group-30,    |  Actual Points:
  029-backport, 031-backport, 032-backport       |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by dgoulet):

 Replying to [comment:18 teor]:
 > Do we know if the extra load is bringing down HSDirs?
 > (The fetch creates more load, but HS descriptors are cached by clients.)

 Can't say but it is possible yes.

 > Let's open separate tickets for 0.3.4 for blocking Tor2web HSDir and
 Intro. And we should think about backporting the HSDir defence, because we
 will want it if the load gets worse.
 >
 > We might also want to block single onion / Tor2web intros and rendezvous
 by default, and backport the code for security. The existing tickets are
 #22688 and #22689.

 I've created the high level parent ticket for all this tor2web mess in
 #24962. I've then created a ticket for HSDir and Intro (#24963 and #24964
 respectively).

 I've make #17945 a child of this #24962 parent ticket as well.

 Lets put everything we got into that parent related to "Stop tor2web
 directly connecting to relays".

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24902#comment:19>
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