Novell LINUX ENTERPRISE SERVER 11 - ADMINISTRATION Administration Manual page 135

CUPS Client
Normally, a CUPS client runs on a regular workstation located in a trusted network
environment behind a firewall. In this case it is recommended to configure the network
interface to be in the Internal Zone, so the workstation is reachable from within
the network.
CUPS Server
If the CUPS server is part of a trusted network environment protected by a firewall, the
network interface should be configured to be in the Internal Zone of the firewall.
It is not recommended to set up a CUPS server in an untrusted network environment
unless you take care that it is protected by special firewall rules and secure settings in
the CUPS configuration.
10.7.2 PPD Files in Various Packages
The YaST printer configuration sets up the queues for CUPS using only the PPD files
installed in /usr/share/cups/model. To find the suitable PPD files for the
printer model, YaST compares the vendor and model determined during hardware de-
tection with the vendors and models in all PPD files available in /usr/share/cups/
model on the system. For this purpose, the YaST printer configuration generates a
database from the vendor and model information extracted from the PPD files. When
you select a printer, receive the PPD files matching the vendor and model from the list
of models.
The configuration using only PPD files and no other information sources has the advan-
tage that the PPD files in /usr/share/cups/model can be modified freely. The
YaST printer configuration recognizes changes and regenerates the vendor and model
database. For example, if you only have PostScript printers, normally you do not need
the Foomatic PPD files in the cups-drivers package or the Gutenprint PPD files
in the gutenprint package. Instead, the PPD files for your PostScript printers can
be copied directly to /usr/share/cups/model (if they do not already exist in the
manufacturer-PPDs package) to achieve an optimum configuration for your
printers.
Printer Operation 121