Disabling CTRL+ALT+F9


I am desperate to disable interaction and even output to TTY9 (or maybe password protect) by pressing CTRL+ALT+F9 key on keyboard to avoid unauthorized access to it and meanwhile keep colorization when connecting to asterisk with -R switch.

I’ve tried to play with TTY=9 and CONSOLE=yes/no in in /usr/sbin/safe_asterisk, this disables TTY9, however I am loosing colorization.

Any ideas?