listen *:80; ## listen for ipv4
        server_name sitename *.sitename;

        if ($host !~* ^www\.) {
            rewrite ^(.*)$ http://www.$host$1 permanent;
        }
        location /index.html {
            if ($request_uri = /index.html) {
                rewrite ^ http://$host? permanent;
            }
        }

        set $subdomain "";
        if ($host ~* ^www.([a-z0-9-\.]+)\.sitename$) {
            set $subdomain $1;
            set $proxypass "www.${subdomain}";
        }
        if ($host ~* ^www.sitename$) {
            set $subdomain "www";
            set $proxypass "www";
        }

        root /home/username/www/sitename/$subdomain/htdocs/;