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[liberationtech] Images of Blocking in Different Countries?

Eric S Johnson crates at
Wed Aug 15 12:04:04 PDT 2012

Yes-they stopped doin packet inspection in about 2008, near as I can tell.






From: Steve Weis [mailto:steveweis at] 
Sent: Thursday, 16 August 2012 00:56
To: Eric S Johnson
Cc: Stanford tech list
Subject: Re: [liberationtech] Images of Blocking in Different Countries?


This paper "Ignoring the Great Firewall of China" is a few years old, but at
the time China was inspecting TCP packets for verboten keywords:

The blocking was easy to circumvent. The researchers were able to just
ignore TCP reset packets and the connections proceeded unhindered. They also
were able to conduct a denial of service attack against IP addresses in
China by spoofing packets with forbidden content, which would trigger
spurious connection resets.


This was 6 years ago, so I'm sure the game has changed somewhat. 


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