To put an elephant into a fridge-three steps(which I think you already knew it):

Firstly(open the fridge):In nginx,add a line in /usr/local/nginx/conf/proxy.conf:
proxy_set_header        X-Real-IP       $remote_addr;
#Note:Add this just in proxy.conf,repetitive addition in nginx.conf location and server place will result your backend server log repetitive times.

Secondly(put the elephant in):In backend apache server,add the following lines in place VirtualHost or Server: Read more…