1<!DOCTYPE HTML> 2<html> 3<!-- SECTION: Man Pages --> 4<head> 5 <link rel="stylesheet" type="text/css" href="/cups-printable.css"> 6 <title>cups-lpd(8)</title> 7</head> 8<body> 9<h1 class="title">cups-lpd(8)</h1> 10<h2 class="title"><a name="NAME">Name</a></h2> 11cups-lpd - receive print jobs and report printer status to lpd clients 12<h2 class="title"><a name="SYNOPSIS">Synopsis</a></h2> 13<b>cups-lpd</b> 14[ 15<b>-h </b><i>hostname</i>[<b>:</b><i>port</i>] 16] [ 17<b>-n</b> 18] [ 19<b>-o</b> 20<i>option=value</i> 21] 22<h2 class="title"><a name="DESCRIPTION">Description</a></h2> 23<b>cups-lpd</b> 24is the CUPS Line Printer Daemon ("LPD") mini-server that supports legacy client systems that use the LPD protocol. 25<b>cups-lpd</b> 26does not act as a standalone network daemon but instead operates using any of the Internet "super-servers" such as 27<b>inetd</b>(8), 28<b>launchd</b>(8), 29and 30<b>systemd</b>(8). 31<h2 class="title"><a name="OPTIONS">Options</a></h2> 32<dl class="man"> 33<dt><b>-h </b><i>hostname</i>[<b>:</b><i>port</i>] 34<dd style="margin-left: 5.0em">Sets the CUPS server (and port) to use. 35<dt><b>-n</b> 36<dd style="margin-left: 5.0em">Disables reverse address lookups; normally 37<b>cups-lpd</b> 38will try to discover the hostname of the client via a reverse DNS lookup. 39<dt><b>-o </b><i>name=value</i> 40<dd style="margin-left: 5.0em">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 41<b>inetd</b>(8) 42example below sets the "document-format" option to "application/octet-stream" which forces autodetection of the print file format. 43</dl> 44<h2 class="title"><a name="CONFORMING_TO">Conforming To</a></h2> 45<b>cups-lpd</b> 46does not enforce the restricted source port number specified in RFC 1179, as using restricted ports does not prevent users from submitting print jobs. 47While this behavior is different than standard Berkeley LPD implementations, it should not affect normal client operations. 48<p>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. 49<h2 class="title"><a name="ERRORS">Errors</a></h2> 50Errors are sent to the system log. 51<h2 class="title"><a name="FILES">Files</a></h2> 52<pre class="man"> 53<i>/etc/inetd.conf</i> 54<i>/etc/xinetd.d/cups-lpd</i> 55<i>/System/Library/LaunchDaemons/org.cups.cups-lpd.plist</i> 56</pre> 57<h2 class="title"><a name="NOTES">Notes</a></h2> 58<h3><a name="PERFORMANCE">Performance</a></h3> 59<b>cups-lpd</b> 60performs well with small numbers of clients and printers. 61However, 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. 62We highly recommend that large configurations use the native IPP support provided by CUPS instead. 63<h3><a name="SECURITY">Security</a></h3> 64<b>cups-lpd</b> 65currently does not perform any access control based on the settings in <i>cupsd.conf(5)</i> or in the <i>hosts.allow(5)</i> or <i>hosts.deny(5)</i> files used by TCP wrappers. 66Therefore, running 67<b>cups-lpd</b> 68on your server will allow any computer on your network (and perhaps the entire 69Internet) to print to your server. 70<p>While 71<b>xinetd</b>(8) 72has built-in access control support, you should use the TCP wrappers package with 73<b>inetd</b>(8) 74to limit access to only those computers that should be able to print through your server. 75<p><b>cups-lpd</b> 76is not enabled by the standard CUPS distribution. 77Please consult with your operating system vendor to determine whether it is enabled by default on your system. 78<h2 class="title"><a name="EXAMPLE">Example</a></h2> 79If you are using 80<b>inetd</b>(8), 81add the following line to the <i>inetd.conf</i> file to enable the 82<b>cups-lpd</b> 83mini-server: 84<pre class="man"> 85 86 printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd \ 87 -o document-format=application/octet-stream 88 89</pre> 90<p><i>Note:</i> If you are using Solaris 10 or higher, you must run the 91<b>inetdconv</b>(1m) 92program to register the changes to the <i>inetd.conf</i> file. 93<p>CUPS includes configuration files for 94<b>launchd</b>(8), 95<b>systemd</b>(8), 96and 97<b>xinetd(8).</b> 98Simply enable the 99<b>cups-lpd</b> 100service using the corresponding control program. 101<h2 class="title"><a name="SEE_ALSO">See Also</a></h2> 102<a href="man-cups.html?TOPIC=Man+Pages"><b>cups</b>(1),</a> 103<a href="man-cupsd.html?TOPIC=Man+Pages"><b>cupsd</b>(8),</a> 104<b>inetconv</b>(1m), 105<b>inetd</b>(8), 106<b>launchd</b>(8), 107<b>xinetd</b>(8), 108CUPS Online Help (<a href="http://localhost:631/help)">http://localhost:631/help)</a>, 109RFC 2569 110<h2 class="title"><a name="COPYRIGHT">Copyright</a></h2> 111Copyright © 2007-2014 by Apple Inc. 112 113</body> 114</html> 115