diff --git a/machines/vault01/k-radius/module.nix b/machines/vault01/k-radius/module.nix
index 9979605..ac83bc0 100644
--- a/machines/vault01/k-radius/module.nix
+++ b/machines/vault01/k-radius/module.nix
@@ -7,13 +7,15 @@
 
 let
   inherit (lib)
+    attrsToList
+    getExe'
+    imap0
+    mapAttrsToList
     mkEnableOption
     mkIf
     mkOption
-    types
-    mapAttrsToList
     optionalString
-    zipListsWith
+    types
     ;
 
   settingsFormat = pkgs.formats.toml { };
@@ -49,14 +51,14 @@ in
 
     extra-mods = mkOption {
       type = types.attrsOf types.path;
-      description = "Additional files to be linked in mods-enabled.";
       default = { };
+      description = "Additional files to be linked in mods-enabled.";
     };
 
     extra-sites = mkOption {
       type = types.attrsOf types.path;
-      description = "Additional files to be linked in sites-enabled.";
       default = { };
+      description = "Additional files to be linked in sites-enabled.";
     };
 
     dictionary = mkOption {
@@ -69,8 +71,8 @@ in
           "string"
         ]
       );
-      description = "Declare additionnal attributes to be listed in the dictionary.";
       default = { };
+      description = "Declare additionnal attributes to be listed in the dictionary.";
     };
 
     radiusClients = mkOption {
@@ -109,7 +111,7 @@ in
 
     checkConfiguration = mkOption {
       type = types.bool;
-      description = "Check the configuration before starting the deamon. Usefull for debugging.";
+      description = "Check the configuration before starting the deamon. Useful for debugging.";
       default = false;
     };
   };
@@ -202,18 +204,16 @@ in
         sed -i ${cfg.configDir}/mods-available/eap \
           -e "s/whatever/$(cat "${cfg.privateKeyPasswordFile}")/"
 
-        # Build the dictionary
-        cat <<EOF > ${cfg.configDir}/dictionary
-        ${
-          let
-            attrs = mapAttrsToList (name: type: { inherit name type; }) cfg.dictionary;
-            idList = builtins.genList (id: 3000 + id) (builtins.length attrs);
-          in
-          builtins.concatStringsSep "\n" (
-            zipListsWith ({ name, type }: id: "ATTRIBUTE ${name} ${toString id} ${type}") attrs idList
+        # Link the dictionary
+        ln -nsf ${
+          pkgs.writeText "radius-dictionary" (
+            builtins.concatStringsSep "\n" (
+              imap0 (i: { name, value }: "ATTRIBUTE ${name} ${builtins.toString (3000 + i)} ${value}") (
+                attrsToList cfg.dictionary
+              )
+            )
           )
-        }
-        EOF
+        } ${cfg.configDir}/dictionary
 
         # Link extra-mods
         ${builtins.concatStringsSep "\n" (
@@ -228,9 +228,7 @@ in
         )}
 
         # Check the configuration
-        ${
-          optionalString (!cfg.checkConfiguration) "# "
-        }${pkgs.freeradius}/bin/radiusd -C -d ${cfg.configDir} -l stdout
+        ${optionalString cfg.checkConfiguration "${getExe' pkgs.freeradius "radiusd"} -C -d ${cfg.configDir} -l stdout"}
       '';
 
       path = [
diff --git a/machines/vault01/networking.nix b/machines/vault01/networking.nix
index 1075982..54c7de9 100644
--- a/machines/vault01/networking.nix
+++ b/machines/vault01/networking.nix
@@ -19,7 +19,7 @@ let
   mkNetwork =
     name:
     {
-      address,
+      address ? [ ],
       extraNetwork ? { },
       ...
     }:
@@ -37,31 +37,30 @@ let
     };
 
   mkUserVlan =
-    {
-      vlan,
-      netIP,
-      servIP,
-      prefixLength,
-      interfaceName,
-      ...
-    }:
+    id:
+    let
+      # on alloue 10.0.0.0/17 aux thurnés, avec un /27 chacun, on garde 10.0.0.0/27 pour nous (routeur et autres)
+      vlan = 4094 - id;
+      prefix24nb = (id + 1) / 8;
+      prefix27nb = (id + 1 - prefix24nb * 8) * 32;
+      netIP = "10.0.${toString prefix24nb}.${toString prefix27nb}";
+      servIP = "10.0.${toString prefix24nb}.${toString (prefix27nb + 1)}";
+      interfaceName = "vlan-user-${toString vlan}";
+    in
     {
       name = interfaceName;
       value = {
         Id = vlan;
-        address = [ ];
         extraNetwork = {
           networkConfig = {
             LinkLocalAddressing = "no";
             DHCPServer = "yes";
           };
-          linkConfig = {
-            Promiscuous = true;
-          };
+          linkConfig.Promiscuous = true;
           addresses = [
             {
               addressConfig = {
-                Address = "${servIP}/${toString prefixLength}";
+                Address = "${servIP}/27";
                 AddPrefixRoute = false;
               };
             }
@@ -69,7 +68,7 @@ let
           routes = [
             {
               routeConfig = {
-                Destination = "${netIP}/${toString prefixLength}";
+                Destination = "${netIP}/27";
                 Table = "user";
               };
             }
@@ -77,7 +76,7 @@ let
           routingPolicyRules = [
             {
               routingPolicyRuleConfig = {
-                From = "${netIP}/${toString prefixLength}";
+                From = "${netIP}/27";
                 To = "10.0.0.0/27";
                 IncomingInterface = interfaceName;
                 Table = "user";
@@ -120,7 +119,7 @@ let
 
       extraNetwork.networkConfig.DHCPServer = "yes";
     };
-  } // builtins.listToAttrs (map mkUserVlan (import ./user_vlans.nix));
+  } // builtins.listToAttrs (builtins.genList mkUserVlan 850);
 in
 
 {
@@ -175,20 +174,19 @@ in
         wantedBy = [ "systemd-networkd.service" ];
         after = [ "sys-subsystem-net-devices-enp67s0f0np0.device" ];
         bindsTo = [ "sys-subsystem-net-devices-enp67s0f0np0.device" ];
-        script = ''
-          ${lib.getExe pkgs.ethtool} -K enp67s0f0np0 rxvlan off
-          ${lib.getExe pkgs.ethtool} -K enp67s0f0np0 txvlan off
-          ${lib.getExe pkgs.ethtool} -K enp67s0f0np0 rx-vlan-filter off
-          ${lib.getExe pkgs.ethtool} -K enp67s0f0np0 rx-vlan-offload off
-          ${lib.getExe pkgs.ethtool} -K enp67s0f0np0 tx-vlan-offload off
-          ${lib.getExe pkgs.ethtool} -K enp67s0f0np0 tx-vlan-stag-hw-insert off
-          echo "Hardware for enp67s0f0np0 configured"
-        '';
+        script = builtins.concatStringsSep "\n" (
+          builtins.map (name: "${lib.getExe pkgs.ethtool} -K enp67s0f0np0 ${name} off") [
+            "rxvlan"
+            "txvlan"
+            "rx-vlan-filter"
+            "rx-vlan-offload"
+            "tx-vlan-offload"
+            "tx-vlan-stag-hw-insert"
+          ]
+        );
       };
 
-      systemd-networkd.serviceConfig = {
-        LimitNOFILE = 4096;
-      };
+      systemd-networkd.serviceConfig.LimitNOFILE = 4096;
     };
   };
 
diff --git a/machines/vault01/user_vlans.nix b/machines/vault01/user_vlans.nix
deleted file mode 100644
index 59ec3a0..0000000
--- a/machines/vault01/user_vlans.nix
+++ /dev/null
@@ -1,14 +0,0 @@
-let
-  mkUserVlan = id: rec {
-    # on alloue 10.0.0.0/17 aux thurnés, avec un /27 chacun, on garde 10.0.0.0/27 pour nous (routeur et autres)
-    vlan = 4094 - id;
-    prefix24nb = (id + 1) / 8;
-    prefix27nb = (id + 1 - prefix24nb * 8) * 32;
-    prefixLength = 27;
-    netIP = "10.0.${toString prefix24nb}.${toString prefix27nb}";
-    servIP = "10.0.${toString prefix24nb}.${toString (prefix27nb + 1)}";
-    broadIP = "10.0.${toString prefix24nb}.${toString (prefix27nb + 31)}";
-    interfaceName = "vlan-user-${toString vlan}";
-  };
-in
-builtins.genList mkUserVlan 850