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+<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-ipv4">
+  <title>IPv4 Configuration</title>
+  <para>
+    By default, NixOS uses DHCP (specifically,
+    <literal>dhcpcd</literal>) to automatically configure network
+    interfaces. However, you can configure an interface manually as
+    follows:
+  </para>
+  <programlisting language="bash">
+networking.interfaces.eth0.ipv4.addresses = [ {
+  address = &quot;192.168.1.2&quot;;
+  prefixLength = 24;
+} ];
+</programlisting>
+  <para>
+    Typically you’ll also want to set a default gateway and set of name
+    servers:
+  </para>
+  <programlisting language="bash">
+networking.defaultGateway = &quot;192.168.1.1&quot;;
+networking.nameservers = [ &quot;8.8.8.8&quot; ];
+</programlisting>
+  <note>
+    <para>
+      Statically configured interfaces are set up by the systemd service
+      <literal>interface-name-cfg.service</literal>. The default gateway
+      and name server configuration is performed by
+      <literal>network-setup.service</literal>.
+    </para>
+  </note>
+  <para>
+    The host name is set using
+    <xref linkend="opt-networking.hostName" />:
+  </para>
+  <programlisting language="bash">
+networking.hostName = &quot;cartman&quot;;
+</programlisting>
+  <para>
+    The default host name is <literal>nixos</literal>. Set it to the
+    empty string (<literal>&quot;&quot;</literal>) to allow the DHCP
+    server to provide the host name.
+  </para>
+</section>