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1# IPv6 Configuration {#sec-ipv6}
2
3IPv6 is enabled by default. Stateless address autoconfiguration is used
4to automatically assign IPv6 addresses to all interfaces, and Privacy
5Extensions (RFC 4946) are enabled by default. You can adjust the default
6for this by setting [](#opt-networking.tempAddresses). This option
7may be overridden on a per-interface basis by
8[](#opt-networking.interfaces._name_.tempAddress). You can disable
9IPv6 support globally by setting:
10
11```nix
12networking.enableIPv6 = false;
13```
14
15You can disable IPv6 on a single interface using a normal sysctl (in
16this example, we use interface `eth0`):
17
18```nix
19boot.kernel.sysctl."net.ipv6.conf.eth0.disable_ipv6" = true;
20```
21
22As with IPv4 networking interfaces are automatically configured via
23DHCPv6. You can configure an interface manually:
24
25```nix
26networking.interfaces.eth0.ipv6.addresses = [ {
27 address = "fe00:aa:bb:cc::2";
28 prefixLength = 64;
29} ];
30```
31
32For configuring a gateway, optionally with explicitly specified
33interface:
34
35```nix
36networking.defaultGateway6 = {
37 address = "fe00::1";
38 interface = "enp0s3";
39};
40```
41
42See [](#sec-ipv4) for similar examples and additional information.