[tor-bugs] #4744 [Tor Bridge]: GFW probes based on Tor's SSL cipher list (?)

Thu Jan 5 02:23:03 UTC 2012

#4744: GFW probes based on Tor's SSL cipher list (?)
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 Reporter:  asn         |          Owner:  nickm             
     Type:  defect      |         Status:  accepted          
 Priority:  major       |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Bridge  |        Version:                    
 Keywords:              |         Parent:  #4185             
   Points:              |   Actualpoints:                    
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Comment(by nickm):

 > and hope that it doesn't interfere with v2 signalling

 and fwiw, it is almost impossible to interfere with v2 signalling. The way
 to signal that a tor connection is v2/v3 is by including at least one
 ciphersuite not in the list  TLS1_TXT_DHE_RSA_WITH_AES_128_SHA,
 TLS1_TXT_DHE_RSA_WITH_AES_256_SHA,  SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4744#comment:5>
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