NameVirtualHost cacti.aeirnet.net:12121
<VirtualHost cacti.aeirnet.net:12121>
    ServerAdmin webmaster@cacti.aeirnet.net
    DocumentRoot /usr/local/share/cacti/
    ServerName cacti.aeirnet.net
    ErrorLog /usr/home/admin/logs/cacti.aeirnet.net-error_log
    CustomLog /usr/home/admin/logs/cacti.aeirnet.net-access_log common
</VirtualHost>