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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

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
   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) 2007-2017 by Apple	Inc.

3 June 2014			     CUPS			   cups-lpd(8)

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

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