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1<section xmlns="http://docbook.org/ns/docbook"
2 xmlns:xlink="http://www.w3.org/1999/xlink"
3 xmlns:xi="http://www.w3.org/2001/XInclude"
4 version="5.0"
5 xml:id="sec-ipv4">
6
7<title>IPv4 Configuration</title>
8
9<para>By default, NixOS uses DHCP (specifically,
10<command>dhcpcd</command>) to automatically configure network
11interfaces. However, you can configure an interface manually as
12follows:
13
14<programlisting>
15networking.interfaces.eth0.ip4 = [ { address = "192.168.1.2"; prefixLength = 24; } ];
16</programlisting>
17
18Typically you’ll also want to set a default gateway and set of name
19servers:
20
21<programlisting>
22networking.defaultGateway = "192.168.1.1";
23networking.nameservers = [ "8.8.8.8" ];
24</programlisting>
25
26</para>
27
28<note><para>Statically configured interfaces are set up by the systemd
29service
30<replaceable>interface-name</replaceable><literal>-cfg.service</literal>.
31The default gateway and name server configuration is performed by
32<literal>network-setup.service</literal>.</para></note>
33
34<para>The host name is set using <option>networking.hostName</option>:
35
36<programlisting>
37networking.hostName = "cartman";
38</programlisting>
39
40The default host name is <literal>nixos</literal>. Set it to the
41empty string (<literal>""</literal>) to allow the DHCP server to
42provide the host name.</para>
43
44</section>