[tor-bugs] #27921 [Core Tor/Tor]: apparent DOS / impairment-of-service against FallbackDirs using DIR requests, please evaluate for possible mitigation

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#27921: apparent DOS / impairment-of-service against FallbackDirs using DIR
requests, please evaluate for possible mitigation
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 Reporter:  starlight     |          Owner:  (none)
     Type:  enhancement   |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: unspecified
Component:  Core Tor/Tor  |        Version:  Tor: 0.3.4.1-alpha
 Severity:  Normal        |     Resolution:
 Keywords:  tor-dos       |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by starlight):

 modified the daemon to reject /tor/server/d/<hash> requests with a 404;
 crushed the cockroach

 /tor/micro/d/<hash> left alone, quite a few .z requests for these
 presumably from booting relays and clients

 any objection?  any valid purpose for this request type is critical?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27921#comment:8>
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