代理服务器proxy server

代理服务器proxy server

In computer networks, a proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers.

在计算机网络中，代理服务器是用户和网络服务器之间的中转站。

代理服务器可分为三类:Forwarding proxy、Open proxy、Reverse proxy,三幅图很好地揭示了各种类别的功能、作用范围以及特征等。

(1).Forwarding proxy

A forward proxy taking requests from an internal network and forwarding them to the Internet.

存在于用户计算机上或者用户内部网络节点上。

(2).Open proxy

An open proxy forwarding requests from and to anywhere on the Internet.

存在于中间网络节点上。

(3).Reverse proxy

A reverse proxy taking requests from the Internet and forwarding them to servers in an internal network. Those making requests connect to the proxy and may not be aware of the internal network.

存在于服务器所在的内部网络中，例如Nginx。