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20.8 Special Features in SUSE Linux
Enterprise
A number of CUPS features have been adapted for SUSE Linux Enterprise. Some of
the most important changes are covered here.
20.8.1 CUPS and Firewall
After having performed a default installation of SUSE Linux Enterprise, SuSEfirewall2
is active and the external network devices are configured to be in the External
Zone which blocks incoming traffic. These default settings have to be adjusted when
using CUPS. More information about the SUSEfirewall2 configuration is available in
Section 39.4, "SuSEfirewall2"
(page 736).
CUPS Client
Normally a CUPS client runs on a regular workstation located in a network behind a
firewall. In this case it is recommended to configure the external network devices to
be in the Internal Zone, so the workstation is reachable from within the network.
CUPS Server
If the CUPS server is part of network protected by a firewall, the external network device
should be configured to be in the Internal Zone of the firewall. When being part
of the external zone, the TCP and UDP port 631 needs to be opened in order to make
the CUPS server available in the network.
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