After data has been migrated to the new installation, the verification of the data in both installations can be done online. It should be assured, that no other users have access to the production installation except the testers. That can be done by editing the httpd.conf file in the <install_dir>/httpd/conf directory.
Edit / add the bold lines:
<Directory /home/krono1 /3.4/Kronodoc/KRONO/fcgi/>
SetHandler fastcgi-script
AllowOverride All
Options ExecCGI FollowSymLinks
Order Deny,Allow
Deny from all
Allow from 195.255.175.239
</Directory>