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<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="systemd.dns-delegate"
xmlns:xi="http://www.w3.org/2001/XInclude"
conditional='ENABLE_RESOLVE'>
<refentryinfo>
<title>systemd.dns-delegate</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>systemd.dns-delegate</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd.dns-delegate</refname>
<refpurpose>DNS Server Delegation Configuration</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><simplelist>
<member><filename>/etc/systemd/dns-delegate.d/*.dns-delegate</filename></member>
<member><filename>/run/systemd/dns-delegate.d/*.dns-delegate</filename></member>
<member><filename>/usr/local/lib/systemd/dns-delegate.d/*.dns-delegate</filename></member>
<member><filename>/usr/lib/systemd/dns-delegate.d/*.dns-delegate</filename></member>
</simplelist></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><filename>*.dns-delegate</filename> files may be used to delegate DNS lookups in specific domains to
specific DNS servers. These files are read by
<citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
Each such file defines a combination of one or more DNS servers and one or more DNS domains. Each such
definition synthesizes a DNS lookup scope that ensure lookups below the specified domains are sent to the
specified DNS servers, possibly in addition to any per-interface scopes and the global scope that
<command>systemd-resolved</command> maintains anyway.</para>
</refsect1>
<refsect1>
<title>[Delegate] Section Options</title>
<variablelist class='network-directives'>
<varlistentry>
<term><varname>DNS=</varname></term>
<listitem>
<para>Takes one or more DNS server specifications, in the same syntax as the option of the same name in <citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<xi:include href="version-info.xml" xpointer="v258"/>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Domains=</varname></term>
<listitem>
<para>Takes one or more domain name specifications, in the same syntax as the option of the same name in <citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<xi:include href="version-info.xml" xpointer="v258"/>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>DefaultRoute=</varname></term>
<listitem>
<para>Takes a boolean value, defaults to off. Controls whether this DNS server is a candidate for
looking up records for which no better route exists.</para>
<xi:include href="version-info.xml" xpointer="v258"/>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<example>
<programlisting># /etc/systemd/dns-delegate.d/foobar.dns-delegate
[Delegate]
DNS=203.0.113.47
Domains=foobar.com</programlisting>
<para>This ensures lookups of <literal>foobar.com</literal> and any domains below it are directed to
DNS server 203.0.113.47.</para>
</example>
</refsect1>
<refsect1>
<title>See Also</title>
<para><simplelist type="inline">
<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>resolvectl</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
</simplelist></para>
</refsect1>
</refentry>
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