Because eDirectory passwords are not obfuscated in system memory during the installation or upgrade, we recommend not leaving a server unattended during the installation, upgrade, or configuration.
Using ssh (secure shell) to access the system does not work during installation, but ssh can be used from the system being installed after the first reboot. YaST installation is always a down server installation, so unauthorized users cannot connect to the computer from other computers on the network during an installation or update.