Nginx反向代理 转发IP

nginx反向代理配置时，一般会添加下面的配置：

     

proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header REMOTE-HOST $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;