VPN is a big help for people using the Internet, especially those of us who live or work in China. Many first-time VPN users are thrilled to find out they can access blocked sites such as Google, Twitter, Facebook and Youtube again. At the same time, however, many new VPN users are puzzled by the choices of VPN protocols provided by their VPN providers, such as: PPTP, OpenVPN (including UDP and TCP) and L2TP/IPSec etc.
When you use VPN in China, you might experience the following problem: The VPN works fine for a number of days, and then suddenly it becomes very unreliable and even stops working. You might suspect the GFW has started blocking your VPN connections, which might be the case. However, it’s also quite likely that the problem is caused by your WIFI router. And it’s worth checking on your router for better VPN connections.