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 © 2007-2017 by Apple Inc.