2021-07-01 16:11:54 +01:00
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<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-ipv4">
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<title>IPv4 Configuration</title>
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<para>
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By default, NixOS uses DHCP (specifically,
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<literal>dhcpcd</literal>) to automatically configure network
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interfaces. However, you can configure an interface manually as
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follows:
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</para>
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<programlisting language="bash">
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networking.interfaces.eth0.ipv4.addresses = [ {
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address = "192.168.1.2";
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prefixLength = 24;
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} ];
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</programlisting>
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<para>
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Typically you’ll also want to set a default gateway and set of name
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servers:
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</para>
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<programlisting language="bash">
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networking.defaultGateway = "192.168.1.1";
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networking.nameservers = [ "8.8.8.8" ];
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</programlisting>
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<note>
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<para>
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Statically configured interfaces are set up by the systemd service
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<literal>interface-name-cfg.service</literal>. The default gateway
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and name server configuration is performed by
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<literal>network-setup.service</literal>.
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</para>
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</note>
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<para>
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The host name is set using
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2021-07-04 02:56:26 +01:00
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<xref linkend="opt-networking.hostName" />:
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2021-07-01 16:11:54 +01:00
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</para>
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<programlisting language="bash">
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networking.hostName = "cartman";
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</programlisting>
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<para>
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The default host name is <literal>nixos</literal>. Set it to the
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empty string (<literal>""</literal>) to allow the DHCP
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server to provide the host name.
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</para>
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</section>
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