How to disable Ctrl+Alt+Del causing system reboot in Red Hat Enterprise Linux 6

Solution Verified - Updated -

Issue

  • It's a security vulnerability for us to allow anyone with physical access to reboot our servers via Ctrl-Alt-Delete -- how can we mitigate this?

  • How to make it so that pressing Control-Alt-Delete on a virtual console (black-screen tty) only causes some audit-log entry, instead of a system reboot?

Environment

  • Red Hat Enterprise Linux 6

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