What is Fragment and How Does It Work?
Fragment works by breaking the outgoing packets into smaller fragments. In this way, the SNI is transmitted in multiple pieces, making it undetectable by the filtering system.
Under normal circumstances, when you send a request to open websites or apps on the internet, the SNI (Server Name Indication) might be detected by filtering systems. SNI represents the main destination of the sent packets, and various protocols are used to conceal it from the filtering system. However, in many cases, due to weak protocols, the SNI can still be identified.
“ Fragment works by breaking the outgoing packets into smaller fragments. In this way, the SNI is transmitted in multiple pieces, making it undetectable by the filtering system. ”
For example, when requesting access to a website like www.bbc.com, which is blocked in Iran, using Fragment allows the request to be sent in several parts. This helps bypass the GFW (Great Firewall), and after passing through the filtering system, these fragments are reassembled on the server.