[tor-bugs] #4581 [Tor Directory Authority]: Dir auths should defend themselves from too many begindir requests per address

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#4581: Dir auths should defend themselves from too many begindir requests per
address
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 Reporter:  arma                     |          Owner:                    
     Type:  defect                   |         Status:  new               
 Priority:  normal                   |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Directory Authority  |        Version:                    
 Keywords:                           |         Parent:                    
   Points:                           |   Actualpoints:                    
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Comment(by arma):

 How many is the right number to allow? Clients do descriptor fetches in
 parallel, and I think the number that they do is a function of the total
 number of descriptors they plan to fetch. In that case the number of
 "allowable" parallel fetches should be a function of the size of the
 network?

 But the problem here is consensus fetches, not descriptor fetches, and
 more than one consensus fetch in parallel to a given dir auth is probably
 a poor idea.

 If only we had some way to know what they will ask for, before they ask
 it.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4581#comment:1>
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