31.3.3. Firewall Considerations
vncboot parameter, you may also want to pass the
vncpasswordparameter in these scenarios. While the password is sent in plain text over the network, it does provide an extra step before a viewer can connect to a system. Once the viewer connects to the target system over VNC, no other connections are permitted. These limitations are usually sufficient for installation purposes.
vncpasswordoption. It should not be a password you use on any systems, especially a real root password.
vncconnectparameter. In this mode of operation, you start the viewer on your system first telling it to listen for an incoming connection. Pass
vncconnect=HOSTat the boot prompt and the installer will attempt to connect to the specified HOST (either a hostname or IP address).