When your Nginx web server is running behind a reverse proxy, you will see IP of the reverse proxy server as visitor IP in web servers access log.
To fix this, edit nginx.conf file
vi /etc/nginx/nginx.conf
Find
http {
Inside http section, add
set_real_ip_from IP_ADDRESS_OF_PROXY_SERVER_HERE; real_ip_header X-Forwarded-For;
Example
set_real_ip_from 192.168.122.1; real_ip_header X-Forwarded-For;
Restart Nginx
nginx -s reload
