cups-lpd(8)

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

SYNOPSIS
       cups-lpd [ -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  net-
       work  daemon  but  instead  operates  using  the  Internet
       "super-server" inetd(8). Add the  following  line  to  the
       inetd.conf file to enable the cups-lpd daemon:

           printer stream tcp nowait lp /path/to/cups/daemon/cups-lpd cups-lpd -o document-format=application/octet-stream

       If  you are using the newer xinetd(8) daemon, add the fol-
       lowing lines to the xinetd.conf file:

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

       The /path/to/cups/daemon is  usually  /usr/lib/cups/daemon
       or  /usr/libexec/cups/daemon,  depending  on the operating
       system.  Consult the cupsd.conf file for  the  local  set-
       ting.

OPTIONS
       The  -o  option  to cups-lpd 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:

           printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd         -o document-format=application/octet-stream

           server = /usr/lib/cups/daemon/cups-lpd
           server_args = -o document-format=application/octet-stream

       The example shown resets the document format to be  appli-
       cation/octet-stream,  which  forces  auto-detection of the
       print file type.

PERFORMANCE
       cups-lpd performs well with small numbers of  clients  and



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cups-lpd(8)           Easy Software Products          cups-lpd(8)


       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 con-
       figurations  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 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 deter-
       mine whether it is enabled in their distributions.

COMPATIBILITY
       cups-lpd does not enforce the restricted source port  num-
       ber  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 implemen-
       tations, it should not affect normal client operations.

       The output of the status requests follows RFC  2569,  Map-
       ping  between LPD and IPP Protocols. Since many LPD imple-
       mentations  stray  from  this  definition,  remote  status
       reporting to LPD clients may be unreliable.

SEE ALSO
       cupsd(8),  inetd(8),  xinetd(8), CUPS Software Administra-
       tors Manual, http://localhost:631/documentation.html

COPYRIGHT
       Copyright 1993-2005 by Easy Software Products, All  Rights
       Reserved.














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