A proxy server acts as a mediator between a client and a target server. It allows the client to connect indirectly to the target server through the proxy server, which can be used to obtain network information, control and register forwarded notifications, and act as an intermediary between personal networks and Internet service providers. Its main purpose is to deliver legitimate network information. One of the benefits of using a proxy server is that it can increase access speed, hide real IP addresses, and bypass access restrictions. It can serve various functions, including connectivity, security, caching, content filtering, and access control. Proxy servers work at the dialogue layer of the Open Systems Interconnection (OSI) model and are an essential security function provided by Internet link-level gateways. When a user sends a request to a website, the browser will send the request signal to the proxy server, and then the proxy server will send the request to the target website and then transmit it to the browser after receiving the response signal. By caching web page content, a proxy server can improve browsing efficiency by allowing the browser to avoid sending requests to obtain existing information repeatedly. Proxy servers can provide multiple functions, including accelerating web browsing speed, providing security filtering and flow control, user management, and serving as a network firewall to protect the security of the intranet network and solve problems caused by insufficient IP addresses.