cups-lpd(8) — Linux manual page


cups-lpd(8)                    Apple Inc.                    cups-lpd(8)

NAME         top

       cups-lpd - receive print jobs and report printer status to lpd
       clients (deprecated)

SYNOPSIS         top

       cups-lpd [ -h hostname[:port] ] [ -n ] [ -o option=value ]

DESCRIPTION         top

       cups-lpd is the CUPS Line Printer Daemon ("LPD") mini-server that
       supports legacy client systems that use the LPD protocol.  cups-
       lpd does not act as a standalone network daemon but instead
       operates using any of the Internet "super-servers" such as
       inetd(8), launchd(8), and systemd(8).

OPTIONS         top

       -h hostname[:port]
            Sets the CUPS server (and port) to use.

       -n   Disables reverse address lookups; normally cups-lpd will try
            to discover the hostname of the client via a reverse DNS

       -o name=value
            Inserts options for all print queues. Most often this is
            used to disable the "l" filter so that remote print jobs are
            filtered as needed for printing; the inetd(8) example below
            sets the "document-format" option to "application/octet-
            stream" which forces autodetection of the print file format.

CONFORMING TO         top

       cups-lpd does not enforce the restricted source port number
       specified in RFC 1179, as using restricted ports does not prevent
       users from submitting print jobs.  While this behavior is
       different than standard Berkeley LPD implementations, it should
       not affect normal client operations.

       The output of the status requests follows RFC 2569, Mapping
       between LPD and IPP Protocols. Since many LPD implementations
       stray from this definition, remote status reporting to LPD
       clients may be unreliable.

ERRORS         top

       Errors are sent to the system log.

FILES         top


NOTES         top

       The cups-lpd program is deprecated and will no longer be
       supported in a future feature release of CUPS.

       cups-lpd performs well with small numbers of clients and
       printers.  However, since a new process is created for each
       connection and since each process must query the printing system
       before each job submission, it does not scale to larger
       configurations.  We highly recommend that large configurations
       use the native IPP support provided by CUPS instead.

       cups-lpd currently does not perform any access control based on
       the settings in cupsd.conf(5) or in the hosts.allow(5) or
       hosts.deny(5) files used by TCP wrappers.  Therefore, running
       cups-lpd on your server will allow any computer on your network
       (and perhaps the entire Internet) to print to your server.

       While xinetd(8) has built-in access control support, you should
       use the TCP wrappers package with inetd(8) to limit access to
       only those computers that should be able to print through your

       cups-lpd is not enabled by the standard CUPS distribution.
       Please consult with your operating system vendor to determine
       whether it is enabled by default on your system.

EXAMPLE         top

       If you are using inetd(8), add the following line to the
       inetd.conf file to enable the cups-lpd mini-server:

           printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd \
               -o document-format=application/octet-stream

       Note: If you are using Solaris 10 or higher, you must run the
       inetdconv(1m) program to register the changes to the inetd.conf

       CUPS includes configuration files for launchd(8), systemd(8), and
       xinetd(8).  Simply enable the cups-lpd service using the
       corresponding control program.

SEE ALSO         top

       cups(1), cupsd(8), inetconv(1m), inetd(8), launchd(8), xinetd(8),
       CUPS Online Help (http://localhost:631/help), RFC 2569

COPYRIGHT         top

       Copyright © 2007-2019 by Apple Inc.

COLOPHON         top

       This page is part of the CUPS (a standards-based, open source
       printing system) project.  Information about the project can be
       found at ⟨⟩.  If you have a bug report for
       this manual page, see ⟨⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨⟩ on 2021-08-27.  (At that time,
       the date of the most recent commit that was found in the
       repository was 2021-08-24.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

26 April 2019                     CUPS                       cups-lpd(8)

Pages that refer to this page: cupsd(8)