4 .\" cups-lpd man page for CUPS.
6 .\" Copyright 2007-2013 by Apple Inc.
7 .\" Copyright 1997-2006 by Easy Software Products.
9 .\" These coded instructions, statements, and computer programs are the
10 .\" property of Apple Inc. and are protected by Federal copyright
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13 .\" file is missing or damaged, see the license at "http://www.cups.org/".
15 .TH cups-lpd 8 "CUPS" "8 July 2013" "Apple Inc."
17 cups-lpd \- receive print jobs and report printer status to lpd clients
26 \fIcups-lpd\fR is the CUPS Line Printer Daemon ("LPD")
27 mini-server that supports legacy client systems that use the LPD
28 protocol. \fIcups-lpd\fR does not act as a standalone network
29 daemon but instead operates using the Internet "super-server"
30 \fIinetd(8)\fR or \fIxinetd(8)\fR. If you are using \fIinetd\fR,
31 add the following line to the \fIinetd.conf\fR file to enable the
32 \fIcups-lpd\fR mini-server:
36 printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd \\
37 -o document-format=application/octet-stream
41 \fBNote:\fR If you are using Solaris 10 or higher, you must run
42 the \fIinetdconv(1m)\fR program to register the changes to the
45 If you are using the newer \fIxinetd(8)\fR daemon, create a file
46 named \fI/etc/xinetd.d/cups\fR containing the following lines:
58 server = /usr/lib/cups/daemon/cups-lpd
59 server_args = -o document-format=application/octet-stream
66 Sets the CUPS server (and port) to use.
70 Disables reverse address lookups; normally \fIcups-lpd\fR will
71 try to discover the hostname of the client via a reverse DNS
76 Inserts options for all print queues. Most often this is used to
77 disable the "l" filter so that remote print jobs are filtered as
78 needed for printing; the examples in the previous section set the
79 "document-format" option to "application/octet-stream" which
80 forces autodetection of the print file format.
82 \fIcups-lpd\fR performs well with small numbers of clients and
83 printers. However, since a new process is created for each
84 connection and since each process must query the printing system
85 before each job submission, it does not scale to larger
86 configurations. We highly recommend that large configurations
87 use the native IPP support provided by CUPS instead.
89 \fIcups-lpd\fR currently does not perform any access control
90 based on the settings in \fIcupsd.conf(5)\fR or in the
91 \fIhosts.allow(5)\fR or \fIhosts.deny(5)\fR files used by TCP
92 wrappers. Therefore, running \fIcups-lpd\fR on your server will
93 allow any computer on your network (and perhaps the entire
94 Internet) to print to your server.
96 While \fIxinetd\fR has built-in access control support, you
97 should use the TCP wrappers package with \fIinetd\fR to limit
98 access to only those computers that should be able to print
101 \fIcups-lpd\fR is not enabled by the standard CUPS distribution.
102 Please consult with your operating system vendor to determine
103 whether it is enabled on your system.
105 \fIcups-lpd\fR does not enforce the restricted source port
106 number specified in RFC 1179, as using restricted ports does not
107 prevent users from submitting print jobs. While this behavior is
108 different than standard Berkeley LPD implementations, it should
109 not affect normal client operations.
111 The output of the status requests follows RFC 2569, Mapping
112 between LPD and IPP Protocols. Since many LPD implementations
113 stray from this definition, remote status reporting to LPD
114 clients may be unreliable.
116 \fIcups(1)\fR, \fIcupsd(8)\fR, \fIinetconv(1m)\fR,
117 \fIinetd(8)\fR, \fIxinetd(8)\fR,
119 http://localhost:631/help
121 Copyright 2007-2013 by Apple Inc.