Now you can configure other computers to use your printer, as described in the section ???Setting
Up Printers.??? If you try to print from another computer and it doesn??™t work, here are a few
troubleshooting tips:
Open your firewall. If you have a restrictive firewall, it may not permit printing. You
must enable access to port 513 (UDP and TCP) and possibly port 631 to allow access
to printing on your computer. See Chapter 17 for information on configuring your
firewall.
Enable LPD-style printing. Certain applications may require an older LPD-style
printing service to print on your shared printer. To enable LPD-style printing on your
CUPS server, you must turn on the cups-lpd service. Most Linux distributions that
include CUPS should also include cups-lpd. In Fedora and other Red Hat systems,
type chkconfig cups-lpd on as root user. Then restart the xinetd daemon (service
xinetd restart).
Check names and addresses. Make sure that you entered your computer??™s name
and print queue properly when you configured it on the other computer. Try using
the IP address instead of the hostname. (If that works, it indicates a DNS name resolution
problem.) Running a tool such as ethereal enables you to see where the transaction
fails.
Access changes to your shared printer are made in the /etc/cups/cupsd.
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