DRBL is a distributed RBL, non-central RBL . It uses the conceptions of zones with different weights. DRBL also stands Diskless Remote Boot in Linux, it provides a diskless or systemless environment for client machines. It works on Debian, Ubuntu, Mandriva, Red Hat, Fedora, CentOS and SuSE. Unlike LTSP, it uses distributed hardware resources and makes it possible for clients to fully access local hardware. It also includes Clonezilla, a partitioning and disk cloning utility similar to Symantec Ghost. Check http://drbl.sf.net for more details.