China's Internet filtering regime (the Great FireWall) is the most sophisticated effort of its kind in the world. The internet censorship in Chinese cyberspace is pervasive, sophisticated, andeffective. It comprises multiple levels of legal regulation and technical control.
The Great FireWall is unparalleled anywhere in the world and is an insult to the spirit of online freedom, the Chinese authorities use it blocking thousands of websites and censoring online news.
Because of Chinese government have deployed colossal human and financial resources to obstruct online free expression. Chinese news websites and blogs have been brought under the editorial control of the propaganda apparatus at both the national and local levels.
The use of the Internet keeps growing in China. The country now has more than 160 million Internet users and at least 1.3 million websites. But the Internet's promise of free expression and information has been nipped in the bud by the Chinese government's online censorship and surveillance system. The Govermment is afraid of reign, they want to control all of the society.
In my early report, the Chinese authorities blocks more than thousand of dedicated server in HeNan and GuangDong without any explanation, Also they use the Greate FireWall to blocks some great website like FeedBurner,Blogspot,Youtube and Flickr, prevent people to meet the unwanted material.
The Chinese authorities have a longstanding set of policies restricting the information to which citizens are exposed, and that which they may themselves publicly say. The Internet poses a new challenge to such censorship, both because of the sheer breadth of content typically available, and because sources of content are so often remote from Chinese jurisdiction, and thus much more difficult to penalize for breaching restrictions on permissible materials. There is some evidence that the government has attempted to prevent the spread of unwanted material by preventing the spread of the Internet itself, but a concomitant desire to capture the economic benefits of networked computing has led to a variety of strategies to split the difference.
For example, the government might encourage Internet access through cybercafes rather than in private spaces so that customers' surfing can be physically monitored by others in the cafe. As a technical matter, anecdotal reports have described a shifting set of barriers to surfing the web from Chinese points of access -- sites that are reported unavailable or domain names that are unknown to the system or that lead to unexpected destinations, individual pages that are blocked, and the use of search keywords that results in temporary limits to further searches.
The Great FireWall was bought from Cisco Inc. , the technologies that Cisco sold to China for backbone routing purposes have packet filtering capability, allowing the routers to filter bi-directionally at thepacket level and to implement up to 750,000 different filtering rules. These systems are designed to combat various Internet attacks, including Denial of Service (DoS) attacks and the spread of worms andviruses. These same techniques can beapplied to block political content. The particular technique described in Cisco Systems to be Key Supplier for Building China's Nation-Wide IP Backbone. Also, China regularly blocks access to Web sites that it finds objectionable, including those dealing with politically sensitive subjects.
Activists and human rights organizations have for years charged Cisco and other Westerncorporations with actively assisting China in developing censorship and surveillance systems. Companies such as Microsoft and Cisco respond to these charges by suggesting that they simplysell the technology to China; thus, they cannot and should not control how their customers use what theyhave bought.