"Is it possible to use Novell's AppArmor on Red Hat Enterprise Linux (RHEL) 4?
"James Turnbull: AppArmor was originally only available on SUSE, but at the start of 2006 Novell open sourced the application and made it available at Novell Forge. Since then, some community development has taken place and a port of AppArmor for, RHEL 5 specifically, (but also planned to be back-ported to other RHEL releases) is available. The port is currently still in development release and a production release is not yet available..."