The principle and role of HTTP reverse proxy

HTTP reverse proxy means that the client does not know the real server address, but initiates a request to the reverse proxy, and then the reverse proxy forwards the request to the real server and returns the obtained result to the client. This proxy model can provide the client with load balancing, security, cache acceleration and other functions. In practice, reverse proxies are often used to hide the IP address of the real server and provide higher security.

HTTP反向代理的作用非常广泛，其中之一是负载均衡。通过反向代理，可以将请求分发到多台服务器上，避免单台服务器负载过重，提高整体的性能和稳定性。此外，反向代理还可以作为防火，保护真实服务器免受恶意攻击。另外，反向代理还可以实现内容缓存，加速客户端访问速度。

Definition and role of HTTP reverse proxy

HTTP reverse proxy is a kind of proxy server, which receives and handles the client's request on behalf of the server, and plays a transit role between the client and the real server. After the client initiates a request to the reverse proxy, the reverse proxy sends the request to the real server and then returns the result to the client. This proxy model is transparent to the client, the client does not know the address of the real server, which can effectively protect the security of the server.

HTTP反向代理的作用是多方面的。首先，它可以实现负载均衡，提高服务器的性能和稳定性。其次，反向代理可以作为防火，保护服务器免受网络攻击。此外，反向代理还可以实现内容缓存，加速客户端的访问速度，提高用户体验。

In general, HTTP reverse proxy plays an important role in improving server performance, protecting server security, accelerating client access speed, etc. It is an important part of Internet technology.