Here is Apache config

<VirtualHost fs.example.com:80>
ServerAdmin webmaster@example.com
DocumentRoot /var/www/fs/
ServerName fs.example.com
ServerAlias fs.example.com
ErrorLog /var/log/apache2/fs/error.log
CustomLog /var/log/apache2/fs/access.log combined
LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" proxy
#SetEnvIf X-Forwarded-For "^.*\..*\..*\..*" forwarded
#CustomLog "logs/access_log" combined env=!forwarded
#CustomLog "logs/access_log" proxy env=forwarded

<Directory "/var/www/fs/">
Options Indexes FollowSymLinks Includes ExecCGI
</Directory>
</VirtualHost>