Dear all ...
The above configuration (first part only needed)... was correct
This one:
server {
listen 80;
server_name DOMAIN.COM;
location / {
proxy_pass http://LAMP;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
Just was a mistake with my DNS.
Thanks!