1cups-lpd(8) Apple Inc. 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 [ -h hostname[:port] ] [ -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 as a
15 socket-activatable systemd(1) service.
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18 -h hostname[:port]
19 Sets the CUPS server (and port) to use.
20 -n
22 Disables reverse address lookups; normally cups-lpd will try to
23 discover the hostname of the client via a reverse DNS lookup.
24 -o name=value
26 Inserts options for all print queues. Most often this is used to
27 disable the "l" filter so that remote print jobs are filtered as
28 needed for printing; the examples in the previous section set the
29 "document-format" option to "application/octet-stream" which
30 forces autodetection of the print file format.
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33 cups-lpd performs well with small numbers of clients and printers. How‐
34 ever, since a new process is created for each connection and since each
35 process must query the printing system before each job submission, it
36 does not scale to larger configurations. We highly recommend that large
37 configurations use the native IPP support provided by CUPS instead.
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40 cups-lpd currently does not perform any access control based on the
41 settings in cupsd.conf(5) or in the hosts.allow(5) or hosts.deny(5)
42 files used by TCP wrappers. Therefore, running cups-lpd on your server
43 will allow any computer on your network (and perhaps the entire Inter‐
44 net) to print to your server.
45 You should use configure the firewall to limit TCP port 515 access to
47 only those computers that should be able to print through your server.
48 cups-lpd is not enabled by the standard CUPS distribution. Please con‐
50 sult with your operating system vendor to determine whether it is
51 enabled on your system.
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54 cups-lpd does not enforce the restricted source port number specified
55 in RFC 1179, as using restricted ports does not prevent users from sub‐
56 mitting print jobs. While this behavior is different than standard
57 Berkeley LPD implementations, it should not affect normal client opera‐
58 tions.
59 The output of the status requests follows RFC 2569, Mapping between LPD
61 and IPP Protocols. Since many LPD implementations stray from this defi‐
62 nition, remote status reporting to LPD clients may be unreliable.
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65 CUPS includes configuration files for systemd(8). Simply enable the
66 cups-lpd socket using the corresponding control program.
67 systemctl enable cups-lpd.socket
68 systemctl start cups-lpd.socket
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71 cups(1), cupsd(8), systemd(1), http://localhost:631/help
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74 Copyright 2007-2013 by Apple Inc.
754 August 2008 CUPS cups-lpd(8)