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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 [ -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/libexec/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/libexec/cups/daemon/cups-lpd
            server_args = -o document-format=application/octet-stream
           }

OPTIONS
       -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 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 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 unreli-able. unreliable.
       able.

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

COPYRIGHT
       Copyright 2007 by Apple Inc.



24 April 2006                            Common UNIX Printing System                             cups-lpd(8)