Di ExTreMe

Установил HAProxy.
Через nginx вручную добавляю файлики с названиям сайта и расширения .conf
в директорию /etc/nginx/sites-enabled
domen.com.conf

server {
	listen 80;

	# SSL configuration
	#
	# listen 443 ssl default_server;
	# listen [::]:443 ssl default_server;
	#
	# Self signed certs generated by the ssl-cert package
	# Don't use them in a production server!
	#
	# include snippets/snakeoil.conf;


	# Add index.php to the list if you are using PHP

	server_name domen.com;
location / {
    proxy_set_header HOST $host;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_pass http://192.168.1.50/; 
}

}

service nginx restart
и вот оно счастье :-)