I've been trying to setup a Sugar CRM instance. I've got a domain that has its main site on a server (www.domain.com) and I've created a subdomain (sugar.domain.com), but I wnat this subdomain to be hosted on another server.

This second server has nginx installed, and there's a working WordPress blog there on a virtualhost, so I would need to setup a second site. To do this I've created the directory structure, and I've created a /etc/nginx/sites-enabled/sugar.domain.com configuration file that has the following:

*

    server {
                  listen   80;
                  server_name sugar.domain.com *.domain.com;
                  access_log  /var/www/sugar/log/access.log;
                  error_log      /var/www/sugar/log/error.log info;
                  location / {
                      root /var/www/sugar;
                      index index.php;
                  }

    location ~ .php$ {
        fastcgi_split_path_info ^(.+\.php)(.*)$;
        fastcgi_pass   backend;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /var/www/sugar/$fastcgi_script_name;
        include fastcgi_params;
        fastcgi_param  QUERY_STRING     $query_string;
        fastcgi_param  REQUEST_METHOD   $request_method;
        fastcgi_param  CONTENT_TYPE     $content_type;
        fastcgi_param  CONTENT_LENGTH   $content_length;
        fastcgi_intercept_errors        on;
        fastcgi_ignore_client_abort     on;
        fastcgi_read_timeout 180;

    }


    ## Disable viewing .htaccess & .htpassword
    location ~ /\.ht {
        deny  all;
    }
}
upstream backend {
              server 127.0.0.1:9000;

}

As far as I know, I need the *.domain.com parameter on the "server_name" flag, but something is crashing here: I get either a 403 Forbidden error, or I get PHP code (I can read the PHP file code in the browser, like normal text) that somehow is not executed. I've tried setting permissions to 755 inside the /var/www/sugar/ directory, and I've also set up the owner:group with a chown -R www-data:www-data /var/www/sugar/

The thing is, I don't now if my mistake is in the nginx site configuration, in my folder permissions, or in other place :(

Could it be because of the main domain (www.domain.com) is hosted on other server? Do they have to be together necessarily?