[CentOS] way to disable keyboard and mouse ports

Is there a way to disable the keyboard and mouse ports?

I have a machine in a public area running an application
that no-one needs to touch.

However, someone could come up and plug a keyboard in
it and mouse and be logged in as that user (not root).

Is there a way to disable the mouse and keyboard so
only remote ssh connections will control the PC if
changes need to be made.

This would also include any usb device which is fine
and the PS2 keyboard and mouse.

Thanks,

Jerry

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