Description:
------------
server {
    listen   [::]:80;
    server_name  angosso.net www.example.com;
    access_log  /var/www/logs/example.com.access.log;  

    location / {
        root   /var/www/angosso.net;
        index  index.html index.htm index.pl;
    }

    location /images {
        autoindex on;
    }

    location ~ \.php$ {
        fastcgi_pass   96.31.35.28:8172;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /var/www/angosso.net$fastcgi_script_name;
        include fastcgi_params;
    }
}

Test script:
---------------
Config File \var\www.angosso.net\logs\E:\web\angosso2\account\web.config 

Expected result:
----------------
<system.webServer>
<security>
<add accessType="Allow" users="'\var\www\angosso.net\logs\e:\PHP\php-cgi.exe'*" />
php-cgi.exe. 
Add Role Services
config /section:system.webServer/fastCGI ^
/+[fullPath='\war\www\angosso.net\logs\e:\PHP\php-cgi.exe']
    <authentication>
      <anonymousAuthentication enabled="true" userName="IUSR" />
    </authentication>
   </security>
</system.webServer>

Actual result:
--------------
fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
serve a non-existent file with a .php extension, it passes the request to php-cgi.