On Sat, Jun 09, 2001 at 12:41:10AM +0800, AB Ramos wrote:
> On Fri, Jun 08, 2001 at 10:37:30PM +0800, Pablo Manalastas wrote:
> > You can reboot the system if you do the 3-finger salute Ctrl-Alt-Del.
>
> On SuSE (6.2 at least), ctrl-alt-del is mapped to /sbin/shutdown. It
> can be unmapped by editing /etc/inittab or /etc/rc.config or with yast.
> Once unmapped, ctrl-alt-del has no effect. I have already forgotten
> what the default setting is.
>
> > To prevent an ordinary user from doing this lock the machine in the
> > server room and allow only the system administrators to enter the
> > room.
> >
> > You can also reboot the system if you press the reset button. To
> > prevent this, do as above.
> >
> > You can also reboot the system if you unplug then plug the machine.
> >
> > By the way, the above statements apply not only to RedHat but to other
> > Linux distros, and maybe to other Unix machines.
>
> This statement needs to be qualified. ;)
The point is, the user has _physical_ access to the box (read
reset button, power cable, etc., including the keyboard).
Therefore, whatever software trick you use to secure the box,
it's all useless because the user has physical access anyway.
The inittab trick will only prevent the user from accidentally
doing the three-finger-salute...
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