defiant: allow wireguard routing

flake.nix

@@ -95,6 +95,24 @@
             }
           ];
         };
+        burnham = nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          specialArgs = {
+            inherit inputs;
+          };
+          modules = [
+            # Overlays-module makes "pkgs.unstable" available in configuration.nix
+            ({ config, pkgs, ... }: { nixpkgs.overlays = [ overlay-unstable ]; })
+
+            ./hosts/burnham/configuration.nix
+            sops-nix.nixosModules.sops
+            home-manager.nixosModules.home-manager {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.users."felixalb" = import ./hosts/burnham/home.nix;
+            }
+          ];
+        };
         redshirt = nixpkgs.lib.nixosSystem {
           system = "x86_64-linux";
           specialArgs = {

hosts/burnham/configuration.nix

@@ -0,0 +1,36 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports =
+    [
+      ../../base.nix
+      ../../common/metrics-exporters.nix
+      ./hardware-configuration.nix
+
+      # Infrastructure
+      ./services/wireguard.nix
+
+  ];
+
+  boot.loader.systemd-boot.enable = lib.mkForce false;
+  boot.loader.grub.enable = true;
+  boot.loader.grub.device = "/dev/sda";
+
+  networking = {
+    hostName = "burnham";
+    defaultGateway = "192.168.11.1";
+    interfaces.ens18.ipv4 = {
+      addresses = [
+        { address = "192.168.11.109"; prefixLength = 24; }
+      ];
+    };
+    hostId = "8e24f235";
+  };
+
+  # sops.defaultSopsFile = ../../secrets/burnham/burnham.yaml;
+
+  environment.variables = { EDITOR = "vim"; };
+
+  system.stateVersion = "23.11";
+}
+

hosts/burnham/hardware-configuration.nix

@@ -0,0 +1,30 @@
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/31ff6d37-52d6-43c3-a214-5d38a6c38b0e";
+      fsType = "ext4";
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/cce59ee7-7c83-4165-a9b0-f950cd2e3273"; }
+    ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  #networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens18.useDHCP = lib.mkDefault true;
+
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

hosts/burnham/home.nix

@@ -0,0 +1,19 @@
+{ pkgs, lib, ... }:
+{
+  home.packages = with pkgs; [
+    bat
+    bottom
+    ncdu
+    neofetch
+  ];
+
+  imports = [
+    ./../../home/base.nix
+  ];
+
+  programs = {
+    zsh.shellAliases."rebuild" = "sudo nixos-rebuild switch --flake /config";
+  };
+
+  home.stateVersion = "23.05";
+}

hosts/burnham/services/wireguard.nix

@@ -0,0 +1,38 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.networking.wireguard.interfaces."wg0";
+in {
+  networking = {
+    nat = {
+      enable = true;
+      externalInterface = "ens18";
+      internalInterfaces = [ "wg0" ];
+    };
+    firewall.allowedUDPPorts = [ cfg.listenPort ];
+
+    wireguard.interfaces."wg0" = {
+      ips = [ "10.100.0.2/24" ];
+      listenPort = 51820;
+      privateKeyFile = "/etc/wireguard/burnham.private";
+
+      postSetup = ''
+        ${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.100.0.0/24 -d 192.168.11.0/24 -o eth0 -j MASQUERADE
+      '';
+      postShutdown = ''
+        ${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -d 192.168.11.0/24 -o eth0 -j MASQUERADE
+      '';
+
+      peers = [
+        { # Defiant
+          publicKey = "8/711GhmN9+NcduHF4JPkfoZPE0qsDLuwhABcPyjNxI=";
+          persistentKeepalive = 120;
+          allowedIPs = [
+            "10.100.0.1/32"
+            "192.168.10.0/24"
+          ];
+          endpoint = "site3.feal.no:51902";
+        }
+      ];
+    };
+  };
+}

hosts/defiant/configuration.nix

@@ -6,12 +6,15 @@
       ../../base.nix
       ../../common/metrics-exporters.nix
       ./hardware-configuration.nix
-      ./libvirt.nix
 
+      # Infrastructure
+      ./libvirt.nix
       ./services/nginx.nix
       ./services/pihole.nix
       ./services/postgresql.nix
+      ./services/wireguard.nix
 
+      # Services
       ./services/flame.nix
       ./services/gitea.nix
       ./services/hedgedoc.nix

hosts/defiant/services/minecraft.nix

@@ -51,6 +51,7 @@
         "_Oblivion" = "289be565-d73e-4cb1-a047-dcc319acdc80";
         Crisju = "8b77dc43-27ba-4710-bbfd-4e01e6ec7461";
         Dandellion = "f393413b-59fc-49d7-a5c4-83a5d177132c";
+        Evaraknes = "a6adfad8-6c3b-4a0d-912e-d84a0caa1caa";
         Taschmex = "a3a258b0-901f-43d9-b130-dad3b29cd7ee";
         guy_montag = "cb8aa890-a5a3-41f2-9bb7-1edb20c5a31f";
         koppern = "3450494c-b945-4fa2-938c-5519adec005f";

hosts/defiant/services/wireguard.nix

@@ -0,0 +1,43 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.networking.wireguard.interfaces."wg0";
+in {
+  networking = {
+    nat = {
+      enable = true;
+      externalInterface = "enp3s0";
+      internalInterfaces = [ "wg0" ];
+    };
+    firewall.allowedUDPPorts = [ cfg.listenPort ];
+
+    wireguard.interfaces."wg0" = {
+      ips = [ "10.100.0.1/24" ];
+      listenPort = 51820;
+      privateKeyFile = "/etc/wireguard/defiant.private";
+
+      postSetup = ''
+        ${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.100.0.0/24 -d 192.168.10.0/24 -o eth0 -j MASQUERADE
+      '';
+      postShutdown = ''
+        ${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -d 192.168.10.0/24 -o eth0 -j MASQUERADE
+      '';
+
+      peers = [
+        { # Burnham
+          publicKey = "JcfyrMoZmnbibVLaIKuGSARAX2alFv4kwLbJaLBNbzo=";
+          persistentKeepalive = 60;
+          allowedIPs = [
+            "10.100.0.2/32"
+            "192.168.11.0/24"
+          ];
+        }
+        { # Sulu
+          publicKey = "j6YVekgGS4nhL5zUiOTeK2BVQkYGlTQaiUpwcqQyfRk=";
+          allowedIPs = [
+            "10.100.0.3/32"
+          ];
+        }
+      ];
+    };
+  };
+}