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

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

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

DESCRIPTION
       cups-lpd	is the CUPS Line Printer Daemon	("LPD")	mini-server that  sup-
       ports  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 sys-
       temd(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	"docu-
	    ment-format" option	to "application/octet-stream" which forces au-
	    todetection	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 sub-
       mitting	print  jobs.   While  this behavior is different than standard
       Berkeley	LPD implementations, it	should not affect normal client	opera-
       tions.

       The output of the status	requests follows RFC 2569, Mapping between LPD
       and IPP Protocols. Since	many LPD implementations stray from this defi-
       nition, 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
       The cups-lpd program is deprecated and will no longer be	supported in a
       future feature release of CUPS.

   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  in-
       stead.

   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	Inter-
       net) 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  com-
       puters that should be able to print through your	server.

       cups-lpd	is not enabled by the standard CUPS distribution.  Please con-
       sult with your operating	system vendor to determine whether it  is  en-
       abled 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	inetd-
       conv(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
       cups(1),	 cupsd(8), inetconv(1m), inetd(8), launchd(8), xinetd(8), CUPS
       Online Help (http://localhost:631/help),	RFC 2569

COPYRIGHT
       Copyright (C) 2007-2019 by Apple	Inc.

26 April 2019			     CUPS			   cups-lpd(8)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFORMING TO | ERRORS | FILES | NOTES | EXAMPLE | SEE ALSO | COPYRIGHT

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