111 lines
3.3 KiB
Nix
111 lines
3.3 KiB
Nix
{
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config,
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secrets,
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...
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}: {
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systemd.network = {
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# Main interface
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# https://wiki.nixos.org/wiki/Install_NixOS_on_Hetzner_Cloud
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networks."10-lan" = {
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matchConfig.Name = "enp1s0";
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address = [
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"116.203.179.206/32"
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"2a01:4f8:c2c:71c0::/64"
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];
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routes = [
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{routeConfig = {Destination = "172.31.1.1";};}
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{
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routeConfig = {
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Gateway = "172.31.1.1";
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GatewayOnLink = true;
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};
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}
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{routeConfig = {Gateway = "fe80::1";};}
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];
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# Enable proxy ARP to answer ARP requests for the floating IP addresses,
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# intended for the wireguard peers, from Hetzner's router. Without this,
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# the router will not send traffic to us.
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networkConfig.IPv4ProxyARP = true;
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};
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# The following routes traffic destined for 49.13.33.75 (floating IP) to
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# sigma through wireguard. This allows the server to have a public address
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# even though it is behind NAT.
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netdevs."50-wg-sigma-public" = {
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netdevConfig = {
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Name = "wg-sigma-public";
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Kind = "wireguard";
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};
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wireguardConfig = {
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ListenPort = 51820;
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PrivateKeyFile = config.age.secrets.wireguard-private-key-file-alpha.path;
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};
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wireguardPeers = [
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{
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wireguardPeerConfig = {
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PublicKey = "sigmaH/DKSU8KWyrPtucYmS2ewUvDvCNLxd/qYEo0n0=";
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PresharedKeyFile = config.age.secrets.wireguard-preshared-key-file.path;
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# Add to the main routing table that traffic for the address should
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# be sent to sigma.
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AllowedIPs = ["49.13.33.75/32"];
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RouteTable = "main";
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};
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}
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];
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};
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networks."50-wg-sigma-public" = {
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matchConfig.Name = "wg-sigma-public";
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};
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# The following routes traffic destined for the sigma-p2p address (floating
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# IP) to sigma through wireguard. This allows the server to have a public
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# address and help others sail the high seas even though it is behind NAT.
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netdevs."50-wg-sigma-p2p" = {
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netdevConfig = {
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Name = "wg-sigma-p2p";
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Kind = "wireguard";
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};
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wireguardConfig = {
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ListenPort = 51821;
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PrivateKeyFile = config.age.secrets.wireguard-private-key-file-alpha.path;
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};
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wireguardPeers = [
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{
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wireguardPeerConfig = {
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PublicKey = "sigmaH/DKSU8KWyrPtucYmS2ewUvDvCNLxd/qYEo0n0=";
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PresharedKeyFile = config.age.secrets.wireguard-preshared-key-file.path;
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AllowedIPs = ["${secrets.hosts.alpha.sigma-p2p-ip-address}/32"];
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RouteTable = "main";
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};
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}
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];
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};
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networks."50-wg-sigma-p2p" = {
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matchConfig.Name = "wg-sigma-p2p";
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};
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};
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# Enable forwarding of packets
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boot.kernel.sysctl = {
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"net.ipv4.conf.all.forwarding" = true;
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};
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networking = {
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firewall.allowedUDPPorts = [51820 51821];
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};
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age.secrets.wireguard-preshared-key-file = {
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file = "${secrets}/secrets/wireguard-preshared-key-file.age";
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mode = "440";
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owner = "root";
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group = "systemd-network";
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};
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age.secrets.wireguard-private-key-file-alpha = {
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file = "${secrets}/secrets/wireguard-private-key-file-alpha.age";
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mode = "440";
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owner = "root";
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group = "systemd-network";
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};
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}
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