Although many websites are blocked in mainland China, it is not impossible to access them if you are in mainland China. With the help of circumvention software, we can still connect to these blocked websites. So, how does circumvention software achieve breakthrough shielding?

The principles of almost all circumvention software are based on “encrypted proxy transfer”. In order not to be blocked by GFW, you do not directly establish a connection with a foreign target server (such as Google’s server), but first send the request to a foreign server (this server is called a proxy server), and then pass the request The server relays your request to the target server, and the target server responds to you in the same way. The key point of this is that the connection between you and the proxy server will not be blocked by the GFW. That is to say, the GFW considers this connection to be a normal connection, so it allows it.

And if you want to make it impossible for GFW to know which website you are going to visit in the end, you have to rely on encryption technology. That is, the communication traffic between you and the proxy server is encrypted. In this way, the GFW cannot identify the specific content of the traffic, so it can only allow it by default. This is the so-called “blacklist” system.

Different circumvention software and different circumvention methods are only different in the specific implementation methods of encryption, and the essential principles are almost the same as above. With the continuous advancement of technology, today’s firewall software is becoming more and more easy to use, and the methods of circumventing the wall are becoming more and more diverse. Therefore, as long as you want to bypass the wall to access the free network, there are always ways, and the operation is getting easier and easier. This site introduces a lot of literacy knowledge related to circumventing the wall and how to use the software, aiming to make it easy for everyone to learn to circumvent the wall through easy-to-understand explanations, so that the over the wall will gradually become popular among the public.