https://www.cnblogs.com/Anker/p/6056540.html
Forward proxy: the need to configure your own client, the client is aware that he is going to access the server through a proxy-place, client-centric, to help the client service
orientation proxy: server-centric, server services to help
In short, the proxy server is standing on the client side forward proxy, the original proxy server standing there is a reverse proxy.