Novell LINUX ENTERPRISE SERVER 10 SP2 - INSTALLATION AND ADMINISTRATION Installation Manual page 475

• DMA: disabled
If the printer cannot be addressed on the parallel port despite these settings, enter the
I/O address explicitly in accordance with the setting in the BIOS in the form 0x378
in /etc/modprobe.conf. If there are two parallel ports that are set to the I/O ad-
dresses 378 and 278 (hexadecimal), enter these in the form 0x378,0x278.
If interrupt 7 is free, it can be activated with the entry shown in Example 23.1, " /etc/
modprobe.conf: Interrupt Mode for the First Parallel Port " (page 457). Before acti-
vating the interrupt mode, check the file /proc/interrupts to see which interrupts
are already in use. Only the interrupts currently being used are displayed. This may
change depending on which hardware components are active. The interrupt for the
parallel port must not be used by any other device. If you are not sure, use the polling
mode with irq=none.
Example 23.1 /etc/modprobe.conf: Interrupt Mode for the First Parallel Port
alias parport_lowlevel parport_pc
options parport_pc io=0x378 irq=7
23.9.4 Network Printer Connections
Identifying Network Problems
Connect the printer directly to the computer. For test purposes, configure the
printer as a local printer. If this works, the problems are related to the network.
Checking the TCP/IP Network
The TCP/IP network and name resolution must be functional.
Checking the Remote Accessibility
By default, the cupsd only listens on internal network interfaces (localhost).
Check whether the Listen directive(s) in /etc/cups/cupsd.conf allow
access from the outer network:
Listen 192.168.2,*:631
Checking the Firewall Settings
A CUPS server either needs to be in the internal firewall zone or, when being in
the external zone, must be able to send and receive data on the UDP and TCP port
631.
Printer Operation 457