NAME

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

SYNOPSIS

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

DESCRIPTION

       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

       -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 lookup.

       -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

       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

       Errors are sent to the system log.

FILES

       /etc/inetd.conf
       /etc/xinetd.d/cups-lpd
       /System/Library/LaunchDaemons/org.cups.cups-lpd.plist

NOTES

   PERFORMANCE
       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.

   SECURITY
       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 server.

       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

       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 file.

       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

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

COPYRIGHT

       Copyright © 2007-2015 by Apple Inc.