A proxy is a network service that enables a client to access a target server indirectly through the proxy service. This service is beneficial for safeguarding the privacy and security of network terminals. The computer system or network terminal that provides proxy services is referred to as a proxy server.

The working principle of a proxy service is that the client first establishes a connection with the proxy server, and then, as per the proxy protocol used by the proxy server, requests to establish a reference to the target server or obtain the specified resources of the target server. The proxy server may cache the resources obtained from the target server for faster access. If the client's requested resources are present in the proxy server's cache, the proxy server returns the cached resources directly. The primary role of the proxy server is to receive requests from the client and forward them to the target server.

The use of a proxy offers several benefits, including hiding the client's IP address, improving access speed, and bypassing access restrictions. There are numerous proxy service providers available in the market, such as MaxProxy, a well-known overseas proxy. When selecting a proxy service provider, it is advisable to compare several options and test them for the best results.