cups-lpd man page on Oracle

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

       cups-lpd - receive print jobs and report printer status to lpd clients

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

       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 as a
       socket-activatable systemd(1) service.

       -h hostname[:port]
	    Sets the CUPS server (and port) to use.

	    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.

       cups-lpd performs well with small numbers of clients and printers. How‐
       ever, 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.

       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.

       You  should  use configure the firewall to limit TCP port 515 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 con‐
       sult  with  your	 operating  system  vendor  to determine whether it is
       enabled on your system.

       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‐

       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.

       cups(1), cupsd(8), systemd(1), http://localhost:631/help

       Copyright 2007-2013 by Apple Inc.

4 August 2008			     CUPS			   cups-lpd(8)

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