cups-lpd - receive print jobs and report printer status to lpd clients
[ -h hostname
] ] [ -n
[ -o option=value
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 network daemon but instead operates using any of
the Internet "super-servers" such as inetd
(8), and systemd
- -h hostname[:port]
- Sets the CUPS server (and port) to use.
- Disables reverse address lookups; normally cups-lpd
will try to discover the hostname of the client via a reverse DNS
- -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 inetd(8) example below sets
the "document-format" option to
"application/octet-stream" which forces autodetection of the
print file format.
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.
Errors are sent to the system log.
performs well with small numbers of clients and 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 configurations
use the native IPP support provided by CUPS instead.
currently does not perform any access control based on the
settings in cupsd.conf(5)
or in the hosts.allow(5)
files used by TCP wrappers. Therefore, running
on your server will allow any computer on your network (and
perhaps the entire Internet) to print to your server.
(8) has built-in access control support, you should use the
TCP wrappers package with inetd
(8) to limit access to only those
computers that should be able to print through your server.
is not enabled by the standard CUPS distribution. Please consult
with your operating system vendor to determine whether it is enabled by
default on your system.
If you are using inetd
(8), add the following line to the
file to enable the cups-lpd
printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd \
If you are using Solaris 10 or higher, you must run the
(1m) program to register the changes to the inetd.conf
CUPS includes configuration files for launchd
(8). Simply enable the cups-lpd
service using the
corresponding control program.
Online Help (http://localhost:631/help), RFC 2569
Copyright © 2007-2017 by Apple Inc.