<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0" xml:id="sec-ipv6"> <title>IPv6 Configuration</title> <para>IPv6 is enabled by default. Stateless address autoconfiguration is used to automatically assign IPv6 addresses to all interfaces. You can disable IPv6 support globally by setting: <programlisting> networking.enableIPv6 = false; </programlisting></para> <para>You can disable IPv6 on a single interface using a normal sysctl (in this example, we use interface <varname>eth0</varname>): <programlisting> boot.kernel.sysctl."net.ipv6.conf.eth0.disable_ipv6" = true; </programlisting> </para> <para>As with IPv4 networking interfaces are automatically configured via DHCPv6. You can configure an interface manually: <programlisting> networking.interfaces.eth0.ip6 = [ { address = "fe00:aa:bb:cc::2"; prefixLength = 64; } ]; </programlisting> </para> <para>For configuring a gateway, optionally with explicitly specified interface: <programlisting> networking.defaultGateway6 = { address = "fe00::1"; interface = "enp0s3"; } </programlisting> </para> <para>See <xref linkend='sec-ipv4' /> for similar examples and additional information. </para> </section>