Login to CloudControl via SSH using ascadminuser credentials.
Edit the /etc/ssh_banner file using vi or any other editor
vi /etc/ssh_banner
Enter the content of your custom SSH banner.
Save the file.
Reboot CloudControl.
You will see your custom banner displayed at each login before CloudControl prompts you to enter the password.
SSH banner contents displayed at the next login
The changed banner contents remain in the /etc/ssh_banner file even after CloudControl is upgraded.