connection through domain fronting

Configure a server that will act as an intermediary between your client device and the destination domain. This server will receive requests and forward them on your behalf, masking the true destination of the communication.

The proxy server, upon receiving the request, will extract the true destination from the host header and establish a connection with the intended domain. It will then relay the data between your client device and the destination domain, effectively hiding the true destination

When a client wants to communicate with a particular domain, it initiates three types of requests: DNS, HTTP, and TLS. The DNS request is sent to resolve the domain name to an IP address. Then, an HTTP request is made to establish a connection with the front domain acting as a proxy server. Finally, a TLS connection is established to secure the communication between the client and the destination domain.

More info: What Is an Internet Service Provider (ISP)