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Install NixOS on Hetzner Online: Difference between revisions

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== Network configuration ==
== Network configuration ==


Hetzner Cloud offers both IPv4 (/32 or shorter subnets) and IPv6 (/64 subnet) connectivity to each machine. The assigned addresses can be looked up on the [https://robot.hetzner.com/server Hetzner Robot]  on the IPs tab of a machine. The public IPv4 address of the server can automatically be obtained via DHCP. For IPv6 you have to statically configure both address and gateway.
Hetzner Online offers both IPv4 (usually in a shared /26 or /27 subnet) and IPv6 (/64 subnet) connectivity to each machine. The assigned addresses can be looked up on the [https://robot.hetzner.com/server Hetzner Robot]  on the IPs tab of a machine. The public IPv4 address of the server can automatically be obtained via DHCP. For IPv6 you have to statically configure both address and gateway.


<syntaxhighlight lang="nix">
<syntaxhighlight lang="nix">
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   systemd.network = {
   systemd.network = {
     enable = true;
     enable = true;
     networks."30-wan" = {
     networks.default = {
       matchConfig.Name = "enp1s0"; # The predictable name of the network interface
       name = "enp1s0"; # The name of the interface
       networkConfig.DHCP = "ipv4";
       DHCP = "ipv4";
       addresses = [
       addresses = [  
         # Replace the subnet with the one assigned to your machine
         {
        "2a01:4f8:AAAA:BBBB::1/64"
          # Replace the address with the one assigned to your machine
      ];
          Address = "2a01:4f8:AAAA:BBBB::1/64";  
      gateway = [
         }
         "fe80::1"
       ];
       ];
      gateway = [ "fe80::1" ];
       linkConfig.RequiredForOnline = "routable";
       linkConfig.RequiredForOnline = "routable";
     };
     };
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=== Static IPv4 configuration ===
=== Static IPv4 configuration ===
Since the IPv4 network configuration is known, it can also be configured statically, preventing reliance on the DHCP service. The gateway and subnet information is visible when hovering the IPv4 address. The subnet size is usually a /26 (255.255.255.224) or a /27 (255.255.255.192).<syntaxhighlight lang="nix">
Since the IPv4 network configuration is known, it can also be configured statically, preventing reliance on the DHCP service. The gateway and subnet information is visible when hovering the IPv4 address. The subnet size is usually a /26 (<code>255.255.255.224</code>) or a /27 (<code>255.255.255.192</code>).<syntaxhighlight lang="nix">
{
{
   systemd.network = {
   systemd.network = {
     enable = true;
     enable = true;
     networks."30-wan" = {
     networks."30-wan" = {
       matchConfig.Name = "enp1s0"; # The predictable name of the network interface
       name = "enp1s0"; # The predictable name of the network interface
       networkConfig.DHCP = "no";
       DHCP = "no";
       addresses = [
       addresses = [
         # Replace the address and subnet with the one assigned to your machine
         # Replace the addresses with the ones assigned to your machine
         "A.B.C.D/26"
         {
         # Replace the subnet with the one assigned to your machine
          Address = "A.B.C.D/26";
         "2a01:4f8:AAAA:BBBB::1/64"
         }
         {
          Address = "2a01:4f8:AAAA:BBBB::1/64";
        }
       ];
       ];
       gateway = [
       gateway = [
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[[Category:Cookbook]]
[[Category:Cookbook]]
[[Category:Server]]
[[Category:Server]]
[[Category:Deployment]]
Retrieved from "https://wiki.nixos.org/wiki/Install_NixOS_on_Hetzner_Online"