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 the Internet "super-server" inetd(8)  or  xinetd(8).  If  you	are  using
       inetd, 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.

       If you are using the newer xinetd(8) daemon, create a file named /etc/xinetd.d/cups containing the following lines:

	   service printer
	   {
	       socket_type = stream
	       protocol = tcp
	       wait = no
	       user = lp
	    group = sys
	    passenv =
	       server = /usr/lib/cups/daemon/cups-lpd
	    server_args = -o document-format=application/octet-stream
	   }

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 examples in the previous section set the "document-format" option to "application/octet-stream" which  forces
	    autodetection of the print file format.

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 has built-in access control support, you should use the TCP wrappers package with inetd to limit access to only those comput-
       ers 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 on your system.

COMPATIBILITY

       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.

SEE ALSO

       cups(1), cupsd(8), inetconv(1m), inetd(8), xinetd(8),
       http://localhost:631/help

COPYRIGHT

       Copyright 2007-2011 by Apple Inc.

4 August 2008							       CUPS							       cups-lpd(8)