[tor-bugs] #2614 [Metrics]: Test Baidu reachability from exit nodes.

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#2614: Test Baidu reachability from exit nodes.
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 Reporter:  cjb      |          Owner:  cjb
     Type:  defect   |         Status:  new
 Priority:  normal   |      Milestone:     
Component:  Metrics  |        Version:     
 Keywords:           |         Parent:     
   Points:           |   Actualpoints:     
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 This bug describes a test to attempt to establish whether China is
 blocking our exit nodes simplex (incoming traffic to the node receives
 injected TCP reset packets) or duplex (all traffic to the node is blocked,
 in or out).  Knowing this would be useful, because it will affect our
 bridge strategy -- if a bridge is blocked duplex and it knows it (by
 conducting a similar test), it could mark itself as blocked and be removed
 from the bridgedb.

 The test consists of:

  * from each exit relay:
    * try to access a website in China
    * a duplex-blocked node will fail
    * a simplex-blocked node will succeed

 The deliverable from the test should be a count of exit nodes that are
 blocked simplex vs. duplex.

 Two possible methods are .exit notation or a SoaT test.  SoaT is
 preferred.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2614>
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