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 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  autode-
	    tection 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

       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)