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<span style="float:right">systemd 221</span><hr><div class="refentry"><a name="resolved.conf"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>resolved.conf, resolved.conf.d — Network Name Resolution configuration files</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename">/etc/systemd/resolved.conf</code></p><p><code class="filename">/etc/systemd/resolved.conf.d/*.conf</code></p><p><code class="filename">/run/systemd/resolved.conf.d/*.conf</code></p><p><code class="filename">/usr/lib/systemd/resolved.conf.d/*.conf</code></p></div><div class="refsect1"><a name="idm47602988574416"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p>These configuration files control local DNS and LLMNR
name resolving.</p></div><div class="refsection"><a name="main-conf"></a><h2>Configuration Directories and Precedence</h2><p>Default configuration is defined during compilation, so a
configuration file is only needed when it is necessary to deviate
from those defaults. By default the configuration file in
<code class="filename">/etc/systemd/</code> contains commented out entries
showing the defaults as a guide to the administrator. This file
can be edited to create local overrides.
</p><p>When packages need to customize the configuration, they can
install configuration snippets in
<code class="filename">/usr/lib/systemd/*.conf.d/</code>. Files in
<code class="filename">/etc/</code> are reserved for the local
administrator, who may use this logic to override the
configuration files installed by vendor packages. The main
configuration file is read before any of the configuration
directories, and has the lowest precedence; entries in a file in
any configuration directory override entries in the single
configuration file. Files in the
<code class="filename">*.conf.d/</code> configuration subdirectories
are sorted by their filename in lexicographic order, regardless of
which of the subdirectories they reside in. If multiple files
specify the same option, the entry in the file with the
lexicographically latest name takes precedence. It is recommended
to prefix all filenames in those subdirectories with a two-digit
number and a dash, to simplify the ordering of the files.</p><p>To disable a configuration file supplied by the vendor, the
recommended way is to place a symlink to
<code class="filename">/dev/null</code> in the configuration directory in
<code class="filename">/etc/</code>, with the same filename as the vendor
configuration file.</p></div><div class="refsect1"><a name="idm47602983617920"></a><h2 id="Options">Options<a class="headerlink" title="Permalink to this headline" href="#Options">¶</a></h2><div class="variablelist"><dl class="variablelist"><dt id="DNS="><span class="term"><code class="varname">DNS=</code></span><a class="headerlink" title="Permalink to this term" href="#DNS=">¶</a></dt><dd><p>A space separated list of IPv4 and IPv6
addresses to be used as system DNS servers. DNS requests are
sent to one of the listed DNS servers in parallel to any
per-interface DNS servers acquired from
<a href="systemd-networkd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-networkd.service</span>(8)</span></a>.
For compatibility reasons, if set to the empty list the DNS
servers listed in <code class="filename">/etc/resolv.conf</code> are
used, if any are configured there. This setting defaults to
the empty list.</p></dd><dt id="FallbackDNS="><span class="term"><code class="varname">FallbackDNS=</code></span><a class="headerlink" title="Permalink to this term" href="#FallbackDNS=">¶</a></dt><dd><p>A space separated list of IPv4 and IPv6
addresses to be used as the fallback DNS servers. Any
per-interface DNS servers obtained from
<a href="systemd-networkd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-networkd.service</span>(8)</span></a>
take precedence over this setting, as do any servers set via
<code class="varname">DNS=</code> above or
<code class="filename">/etc/resolv.conf</code>. This setting is hence
only used if no other DNS server information is known. If this
option is not given, a compiled-in list of DNS servers is used
instead.</p></dd><dt id="LLMNR="><span class="term"><code class="varname">LLMNR=</code></span><a class="headerlink" title="Permalink to this term" href="#LLMNR=">¶</a></dt><dd><p>Takes a boolean argument or
"<code class="literal">resolve</code>". Controls Link-Local Multicast Name
Resolution support (<a class="ulink" href="https://tools.ietf.org/html/rfc4795" target="_top">RFC 4794</a>) on
the local host. If true enables full LLMNR responder and
resolver support. If false disable both. If set to
"<code class="literal">resolve</code>" only resolving support is enabled,
but responding is disabled. Note that
<a href="systemd-networkd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-networkd.service</span>(8)</span></a>
also maintains per-interface LLMNR settings. LLMNR will be
enabled on an interface only if the per-interface and the
global setting is on.</p></dd></dl></div></div><div class="refsect1"><a name="idm47602983605120"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
<a href="systemd-resolved.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-resolved.service</span>(8)</span></a>,
<a href="systemd-networkd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-networkd.service</span>(8)</span></a>,
<a href="http://man7.org/linux/man-pages/man4/resolv.conf.4.html"><span class="citerefentry"><span class="refentrytitle">resolv.conf</span>(4)</span></a>
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