[tor-bugs] #24964 [Core Tor/Tor]: dos: Block single hop client at the HSDir

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#24964: dos: Block single hop client at the HSDir
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 Reporter:  dgoulet                   |          Owner:  dgoulet
     Type:  defect                    |         Status:  needs_revision
 Priority:  Medium                    |      Milestone:  Tor: 0.4.2.x-final
Component:  Core Tor/Tor              |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tor-dos, tor2web, tor-hs  |  Actual Points:  0.1
Parent ID:  #24962                    |         Points:  0.1
 Reviewer:                            |        Sponsor:  Sponsor27-must
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Comment (by arma):

 Replying to [comment:6 teor]:
 > We could check that the previous hop is a relay in the consensus.
 > If we do that check. then a small number of HSDir requests will fail,
 and the client will try another HSDir with another circuit.

 Careful there! That might be true for client requests (doing a GET), but
 it will be less true for service requests (doing a POST).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24964#comment:7>
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