36 lines
909 B
Markdown
36 lines
909 B
Markdown
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# IPv4 Configuration {#sec-ipv4}
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By default, NixOS uses DHCP (specifically, `dhcpcd`) to automatically
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configure network interfaces. However, you can configure an interface
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manually as follows:
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```nix
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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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```
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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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```nix
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networking.defaultGateway = "192.168.1.1";
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networking.nameservers = [ "8.8.8.8" ];
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```
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::: {.note}
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Statically configured interfaces are set up by the systemd service
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`interface-name-cfg.service`. The default gateway and name server
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configuration is performed by `network-setup.service`.
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:::
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The host name is set using [](#opt-networking.hostName):
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```nix
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networking.hostName = "cartman";
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```
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The default host name is `nixos`. Set it to the empty string (`""`) to
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allow the DHCP server to provide the host name.
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