Instructions:
1. Login in WHM
2. Select Engintron for cPanel/WHM
3. Select Edit your custom rule
4. Uncomment set $PROXY_DOMAIN_OR_IP
5. Add you EXTERNAL IP address (or INTERNAL IP address if you behind firewall and you like use server only for internal network)
Example: set $PROXY_DOMAIN_OR_IP "123.123.123.123"
6. Click to button Update
7. Click to button Nginx > Restart
8. Visit your site