Start the Internet-Explorer
Open “Internet-Options” in the Tools-Menu.

The following screen will appear. Switch the homepage-setting to:

Select the Connections Tab
If you do not see the "Rockenstein-Online"-Connection in the "Dial-up settings"-field then you have to install this connection first. (Read the manual for installing the Dial-up networking)
Enable the radio-button:
"Always dial my default connection"
The click LAN Settings.

Enable the check-box:
"Use automatic configuration script"
and type in the "Address"-Field:
autoproxy.de

The Internet Explorer Configuration is complete.