[tor-dev] Networks Blocking Tor's SSL Connections

[Tim Wilson-Brown - teor]

> On 7 Oct 2015, at 10:52, Brandon Wiley <brandon at blanu.net> wrote:
> 
> Hello! I am a researcher focusing on blockability of Tor connections. If you have pcap files that you would like to share showing Tor SSL connections that have been blocked and non-Tor SSL connections that have not been blocked, this would be helpful for my research. I have this pcap analysis framework: https://github.com/blanu/AdversaryLab-offline <https://github.com/blanu/AdversaryLab-offline> as well as this transport for Tor that uses the analysis to find an optimal encoding so that Tor connections are not blocked: https://github.com/blanu/Dust <https://github.com/blanu/Dust> So essentially given two sets of pcaps, one for blocked connections and one for unblocked connections, I can automatically unblock Tor connections.

I’m sorry, I only have a pcap file for blocked Tor connections.

> If you don't have pcap files or you don't want to share them, if you have access to a network that blocks Tor in a reproducible way, perhaps we could run some tests

I’m sorry, I no longer have access to that network.

> Let me know if you're interested!
> 
> On Tue, Oct 6, 2015 at 6:06 PM, Tim Wilson-Brown - teor <teor2345 at gmail.com <mailto:teor2345 at gmail.com>> wrote:
> Hi All,
> 
> This morning I observed a “free wifi” network blocking tor’s SSL connections. While other SSL connections from my machine went through, I observed multiple network traces of tor completing a TCP 3-way handshake, and then getting no reply to the first SSL packet it sent.
> 
> I think they may have been blocking unknown or untested certificates, but I can’t be sure.
> 
> Still, I was able to use meek(-google) to access tor.
> 
> Has anyone else seen this kind of blocking behaviour?
> (Is this the right list?)
> 
> Tim
> 
> Tim Wilson-Brown (teor)
> 
> teor2345 at gmail dot com
> PGP 968F094B
> 
> teor at blah dot im
> OTR CAD08081 9755866D 89E2A06F E3558B7F B5A9D14F
> 
> 
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> 

Tim Wilson-Brown (teor)

teor2345 at gmail dot com
PGP 968F094B

teor at blah dot im
OTR CAD08081 9755866D 89E2A06F E3558B7F B5A9D14F

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