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How the Great Firewall of China works

     
6:37 am on Feb 25, 2008 (gmt 0)

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The Atlantic's March edition has an interesting article that explains how the Great Firewall of China works.

China’s Great Firewall is crude, slapdash, and surprisingly easy to breach. Here’s why it’s so effective anyway.

"The Connection Has Been Reset" [theatlantic.com]

Depending on how you look at it, the Chinese government’s attempt to rein in the Internet is crude and slapdash or ingenious and well crafted. When American technologists write about the control system, they tend to emphasize its limits. When Chinese citizens discuss it—at least with me—they tend to emphasize its strength. All of them are right, which makes the government’s approach to the Internet a nice proxy for its larger attempt to control people’s daily lives.

Disappointingly, “Great Firewall” is not really the right term for the Chinese government’s overall control strategy. China has indeed erected a firewall—a barrier to keep its Internet users from dealing easily with the outside world—but that is only one part of a larger, complex structure of monitoring and censorship. The official name for the entire approach, which is ostensibly a way to keep hackers and other rogue elements from harming Chinese Internet users, is the “Golden Shield Project.” Since that term is too creepy to bear repeating, I’ll use “the control system” for the overall strategy, which includes the “Great Firewall of China,” or GFW, as the means of screening contact with other countries.

Also outlined in the article are the main ways in which sites and content are blocked in China:

  1. the DNS block
  2. the "Connect" Phase
  3. the URL keyword block
  4. content scanning
11:08 pm on Mar 7, 2008 (gmt 0)

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do they ban adult sites also?
11:54 pm on Mar 7, 2008 (gmt 0)

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Yes.