Could you explain what a proxy protocol is and how it works?

A proxy protocol is a way of organizing an intermediary between a client and a server, which accepts requests from the client and forwards them to the target server. This approach allows hiding the real client address, caching data, filtering traffic, or providing an additional security layer.

It works like this: the client sends a request to the proxy server, which analyzes the request, modifies or caches it if necessary, and then forwards it to the final server. The server's response is returned back through the proxy to the client.

An example of use is corporate networks, where the proxy controls access to the internet and caches frequently requested pages to speed up operation.