‘A golden rule: to leave an incomplete image of oneself.’ –Cioran


What if you could not access YouTube, Facebook, Twitter, and Wikipedia? How would you feel if Google informed you that your connection had been reset during a search? What if Gmail was only periodically available, and Google Docs was completely unreachable?

These things happen almost every day in China. […] Most of these problems are caused by GFW (Great Firewall of China, also known as GFC), one of the most important building blocks in China’s comprehensive censorship system, and perhaps the most sophisticated Internet censorship system in the world. […] Using special techniques, it successfully blocks the majority of Chinese Internet users from accessing most of the Web sites or information that the government doesn’t like. […]

Over a decade of development, GFW has been deployed near the gateways of all Chinese domestic ISPs. With DPI (deep packet inspection) technology, GFW wiretaps all international links and inspects the traffic to detect any sensitive keywords going through the gateway. GFW depends mainly on three technologies to block “harmful” information: IP blocking, DNS (Domain Name System) injection, and TCP RST (Reset).

{ ACM | Continue reading }

photo { Florian Ruiz }