1cups-lpd(8) Easy Software Products cups-lpd(8)
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6 cups-lpd - receive print jobs and report printer status to lpd clients
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9 cups-lpd [ -n ] [ -o option=value ]
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12 cups-lpd is the CUPS Line Printer Daemon ("LPD") mini-server that sup‐
13 ports legacy client systems that use the LPD protocol. cups-lpd does
14 not act as a standalone network daemon but instead operates using the
15 Internet "super-server" inetd(8) or xinetd(8). If you are using inetd,
16 add the following line to the inetd.conf file to enable the cups-lpd
17 mini-server:
18 printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd \
20 -o document-format=application/octet-stream
21 Note: If you are using Solaris 10 or higher, you must run the inetd‐
23 conv(1m) program to register the changes to the inetd.conf file.
24 If you are using the newer xinetd(8) daemon, create a file named
26 /etc/xinetd.d/cups containing the following lines:
27 service printer
29 {
30 socket_type = stream
31 protocol = tcp
32 wait = no
33 user = lp
34 group = sys
35 passenv =
36 server = /usr/lib/cups/daemon/cups-lpd
37 server_args = -o document-format=application/octet-stream
38 }
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41 -n
42 Disables reverse address lookups; normally cups-lpd will try to
43 discover the hostname of the client via a reverse DNS lookup.
44 -o name=value
46 Inserts options for all print queues. Most often this is used to
47 disable the "l" filter so that remote print jobs are filtered as
48 needed for printing; the examples in the previous section set the
49 "document-format" option to "application/octet-stream" which
50 forces autodetection of the print file format.
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53 cups-lpd performs well with small numbers of clients and printers. How‐
54 ever, since a new process is created for each connection and since each
55 process must query the printing system before each job submission, it
56 does not scale to larger configurations. We highly recommend that large
57 configurations use the native IPP support provided by CUPS instead.
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60 cups-lpd currently does not perform any access control based on the
61 settings in cupsd.conf(5) or in the hosts.allow(5) or hosts.deny(5)
62 files used by TCP wrappers. Therefore, running cups-lpd on your server
63 will allow any computer on your network (and perhaps the entire Inter‐
64 net) to print to your server.
65 While xinetd has built-in access control support, you should use the
67 TCP wrappers package with inetd to limit access to only those computers
68 that should be able to print through your server.
69 cups-lpd is not enabled by the standard CUPS distribution. Please con‐
71 sult with your operating system vendor to determine whether it is
72 enabled on your system.
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75 cups-lpd does not enforce the restricted source port number specified
76 in RFC 1179, as using restricted ports does not prevent users from sub‐
77 mitting print jobs. While this behavior is different than standard
78 Berkeley LPD implementations, it should not affect normal client opera‐
79 tions.
80 The output of the status requests follows RFC 2569, Mapping between LPD
82 and IPP Protocols. Since many LPD implementations stray from this defi‐
83 nition, remote status reporting to LPD clients may be unreliable.
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86 cups(1), cupsd(8), inetconv(1m), inetd(8), xinetd(8),
87 http://localhost:631/help
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90 Copyright 1997-2006 by Easy Software Products, All Rights Reserved.
9124 April 2006 Common UNIX Printing System cups-lpd(8)