mgmt init

shared/bastion/forward.nix

@@ -0,0 +1,14 @@
+{ ... }:
+{
+    # Enable packet forwarding and pack logging
+    boot.kernel.sysctl = {
+        # Ipv4 
+        "net.ipv4.conf.all.forwarding" = true;
+        # Ipv6
+        "net.ipv6.conf.all.forwarding" = true;
+
+        # NF
+        "net.netfilter.nf_conntrack_acct" = 1;
+        "net.netfilter.nf_conntrack_log_invalid" = 255;
+    };
+}

shared/bastion/wireguard.nix

@@ -1,5 +1,55 @@
-{ ... }:
+{ config, lib, pkgs, ... }:
 
+let
+    # Import users wireguard sessions
+    users-wg = import ./../users-wg.nix;
+
+    # Import nodes
+    nodes = import ./../../nodes.nix;
+    myPeer = nodes."${config.hostName}";
+    myZone = myPeer.zone;
+
+    buildSecret = zone: {
+        "wg-private-zone-${toString zone}" = {
+            file = ./../../secrets/bastion + ( "/wg-private-zone-" + toString zone + ".age" );
+            owner = "root";
+            group = "root";
+        };
+    };
+
+    peers = map (peerConfig: {
+        name = "${peerConfig.name}";
+        publicKey = peerConfig.publicKey;
+        allowedIPs = [
+            "172.19..${toString (myZone + 128)}${toString peerConfig.id}/32"
+            "fc00:f::${toString (myZone + 128)}:${toString peerConfig.id}/128"
+        ];
+        persistentKeepalive = 25;
+    }) users-wg;
+
+    interface = {
+        "mgmt" = {
+            ips = [
+                "172.19.${toString (myZone + 128)}.254/24"
+                "fc00:f::${toString (myZone + 128)}:254/96"
+            ];
+            privateKeyFile = config.age.secrets."wg-private-zone-${toString myZone}".path;
+            listenPort = 51920;
+            peers = peers;
+        };
+    };
+in
 {
-    # TODO
+    age.secrets = buildSecret myZone;
+
+    # Networkd backend introduce in 25.05
+    # No independant target are generated 
+    # when using networkd as a backend
+    # If custom systemd ordering is needed 
+    # between wg interface and the rest of 
+    # networking: switch to false here
+    networking.wireguard.useNetworkd = true;
+
+    # Return all WireGuard interfaces for each node
+    networking.wireguard.interfaces = interface;
 }

shared/commons/mesh.nix

@@ -35,7 +35,7 @@ let
         interface = {
             "mesh" = {
                 ips = [
-                    "172.19.${toString myZone}.${toString myId}/16"
+                    "172.19.${toString myZone}.${toString myId}/17"
                     "fc00::${toString myZone}:${toString myId}/96"
                 ];
                 privateKeyFile = config.age.secrets."wg-private-zone-${toString myZone}-id-${toString myId}".path;

shared/users-wg.nix

@@ -0,0 +1,12 @@
+[
+    {
+        id = 1;
+        name = "asyncnomi";
+        publicKey = "bj79Gbb4vIv4/fFFANtr8BwjADDQtrZfZg85sZpCuRM=";
+    }
+    {
+        id = 2;
+        name = "gamma";
+        publicKey = "hrYk9spPai3X2bxtZXvwE35MGKUr/G60ZZ4ahgPeZhs=";
+    }
+]