good wiki
More at Wikipedia
Internet censorship circumvention
Internet censorship circumvention, also referred to as going over the wall (c=翻墙|p=fān qiáng) or scientific browsing (c=科学上网|p=kēxué shàngwǎng) in China, is the use of various methods and tools to bypass internet censorship. There are many different techniques to bypass such censorship, each with unique challenges regarding ease of use, speed, and security risks.
About