1 files changed, 57 insertions, 0 deletions
diff --git a/os/kay/modules/wireguard.nix b/os/kay/modules/wireguard.nix
new file mode 100644
index 0000000..578a86a
--- /dev/null
+++ b/os/kay/modules/wireguard.nix
@@ -0,0 +1,57 @@
+{ config, ... }:
+
+let
+  wgInterface = "wg";
+  wanInterface = "ppp0";
+  subnet = "10.0.1.0";
+  prefix = 24;
+  port = 51820;
+in
+{
+  sops.secrets."misc/wireguard" = {};
+
+  networking = {
+    nat = {
+      enable = true;
+      externalInterface = wanInterface;
+      internalInterfaces = [ wgInterface ];
+    };
+    firewall = {
+      allowedUDPPorts = [ port ];
+      extraCommands = ''
+        iptables -t nat -I POSTROUTING 1 -s ${subnet}/${toString prefix} -o ${wanInterface} -j MASQUERADE
+      '';
+    };
+
+    wireguard.interfaces.${wgInterface} = {
+      ips = [ "10.0.1.1/${toString prefix}" ];
+      listenPort = port;
+      mtu = 1380; # 1460 (ppp0) - 80
+      privateKeyFile = config.sops.secrets."misc/wireguard".path;
+
+      peers = [
+        { # cez
+          publicKey = "IcMpAs/D0u8O/AcDBPC7pFUYSeFQXQpTqHpGOeVpjS8=";
+          allowedIPs = [ "10.0.1.2/32" ];
+        }
+        { # veu
+          publicKey = "bJ9aqGYD2Jh4MtWIL7q3XxVHFuUdwGJwO8p7H3nNPj8=";
+          allowedIPs = [ "10.0.1.3/32" ];
+        }
+        { # dad
+          publicKey = "q70IyOS2IpubIRWqo5sL3SeEjtUy2V/PT8yqVExiHTQ=";
+          allowedIPs = [ "10.0.1.4/32" ];
+        }
+        { # shambai
+          publicKey = "YYDlp/bNKkqFHAhdgaZ2SSEMnIjKTqPTK7Ju6O9/1gY=";
+          allowedIPs = [ "10.0.1.5/32" ];
+        }
+      ];
+    };
+  };
+
+  services.dnsmasq.settings = {
+    no-dhcp-interface = wgInterface;
+    interface = [ wgInterface  ];
+  };
+}