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 proto-
       col. 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 con-
       nection 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 net-
       work (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 unreliable.

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

COPYRIGHT
       Copyright 2007-2009 by Apple Inc.



4 August 2008                                                 CUPS                                                   cups-lpd(8)