[tor-bugs] #2576 [Tor Relay]: Can we try to extend from the bridge to a website and learn if the website is reachable?

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#2576: Can we try to extend from the bridge to a website and learn if the website
is reachable?
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 Reporter:  arma       |          Owner:     
     Type:  task       |         Status:  new
 Priority:  normal     |      Milestone:     
Component:  Tor Relay  |        Version:     
 Keywords:             |         Parent:     
   Points:             |   Actualpoints:     
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Comment(by rransom):

 Replying to [ticket:2576 arma]:
 > Ticket #1851 suggests reprogramming bridges to connect to baidu
 periodically, and then report the reachability results in their extrainfo
 descriptors. We'd have to specify how that reporting works, how often the
 tests happen, whether we should generalize to write "baidu.com" in the
 consensus, etc.
 >
 > A much simpler approach would be to build a circuit to the bridge,
 extend that circuit to baidu.com:80, and then look at the failure error
 code and discern whether it was reachable and just didn't TLS right or
 whether it was unreachable.

 So Tor bridges, and ''only'' Tor bridges, will try to open TLS connections
 to baidu.com:80?  Do I really need to tell you that this is a bad idea?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2576#comment:1>
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