DNS censorship

China’s sophisticated filtering system, known as the Great Firewall (GFW), is the region’s biggest impediment to the freedom of information. The GFW is built by the Chinese government and is continuously developed to serve their political interests. In this report, we introduce the design of GFWatch, a large-scale longitudinal measurement platform that informs the public about how GFW censorship changes over time and its negative impact on the free flow of information.