[tor-bugs] #5458 [Tor Client]: Clients should warn in the event of excessive circuit failures

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#5458: Clients should warn in the event of excessive circuit failures
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 Reporter:  mikeperry        |          Owner:  mikeperry
     Type:  defect           |         Status:  assigned 
 Priority:  major            |      Milestone:           
Component:  Tor Client       |        Version:           
 Keywords:  MikePerry201205  |         Parent:  #5456    
   Points:  6                |   Actualpoints:           
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Comment(by asn):

 Replying to [ticket:5458 mikeperry]:
 > In https://lists.torproject.org/pipermail/tor-
 dev/2012-March/003361.html, the raccoon gave us some bounds to determine
 unreasonable amounts of circuit failure that indicate a potential tagging
 attack.
 >
 > Tor Clients should emit warnings if they observe anywhere near this
 amount of circuit failure. His bound for tagging was 80%, but frankly if
 even 50% of my circuits are failing, I would want tor to tell me.
 >
 > Maybe >50% failure should notice and >66% failure should warn?

 Have you measured the ''usual'' percentage of circuits failing?

 IIRC, someone in IRC was tracking his own circuit failure rate, and I
 vaguely remember 30% of his circuits failing. It might be a good idea to
 do some research on how and why our circuits are failing before deploying
 the change of this ticket.

 We might also want to make the percentages configurable, so that users can
 tweak them depending on their paranoia.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5458#comment:8>
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