@fqrouter：这个网站详细记录了什么网站被GFW封的，关键是还记录了是用什么技术手段封的：http://hikinggfw.org/
The aim of Hikinggfw.org?
1. Measurement: Hikinggfw.org monitors what have been blocked, and what technical means the GFW employs to block. Specifically, we monitor:
- Domain names injected or poisoned;
- IP addresses blocked by gateway routers
- Tunnels disabled or interfered by GFW, such as Tor, SSH or OpenVPN