diff --git a/hosts/vm/apprentix/default.nix b/hosts/vm/apprentix/default.nix
index 81e5c14..4e67e57 100644
--- a/hosts/vm/apprentix/default.nix
+++ b/hosts/vm/apprentix/default.nix
@@ -13,7 +13,7 @@
     enable = true;
 
     networking = {
-      id = "50";
+      id = 150;
       srvNat.enable = true;
     };
 
diff --git a/hosts/vm/jitsi/default.nix b/hosts/vm/jitsi/default.nix
index f04f286..518a948 100644
--- a/hosts/vm/jitsi/default.nix
+++ b/hosts/vm/jitsi/default.nix
@@ -13,7 +13,7 @@
     enable = true;
 
     networking = {
-      id = "63";
+      id = 163;
       srv = {
         enable = true;
         ipv4 = "185.230.79.15";
diff --git a/hosts/vm/livre/default.nix b/hosts/vm/livre/default.nix
index 042d63c..9b669a9 100644
--- a/hosts/vm/livre/default.nix
+++ b/hosts/vm/livre/default.nix
@@ -13,7 +13,7 @@
     enable = true;
 
     networking = {
-      id = "40";
+      id = 140;
       srvNat.enable = true;
     };
 
diff --git a/hosts/vm/neo/default.nix b/hosts/vm/neo/default.nix
index f845f57..f2f99ae 100644
--- a/hosts/vm/neo/default.nix
+++ b/hosts/vm/neo/default.nix
@@ -16,7 +16,7 @@
     enable = true;
 
     networking = {
-      id = "41";
+      id = 141;
       srv = {
         enable = true;
         ipv4 = "185.230.79.5";
diff --git a/hosts/vm/nextcloud/default.nix b/hosts/vm/nextcloud/default.nix
index 5bea3e0..99c1ae6 100644
--- a/hosts/vm/nextcloud/default.nix
+++ b/hosts/vm/nextcloud/default.nix
@@ -12,7 +12,7 @@
   crans = {
     enable = true;
     networking = {
-      id = "46";
+      id = 146;
       srvNat = {
         enable = true;
         interface = "ens20";
diff --git a/hosts/vm/periodique/default.nix b/hosts/vm/periodique/default.nix
index e59b98a..d66df0b 100644
--- a/hosts/vm/periodique/default.nix
+++ b/hosts/vm/periodique/default.nix
@@ -13,7 +13,7 @@
     enable = true;
 
     networking = {
-      id = "18";
+      id = 118;
       srvNat.enable = true;
     };
 
diff --git a/hosts/vm/redite/default.nix b/hosts/vm/redite/default.nix
index f4cf49f..45dea89 100644
--- a/hosts/vm/redite/default.nix
+++ b/hosts/vm/redite/default.nix
@@ -13,7 +13,7 @@
     enable = true;
 
     networking = {
-      id = "39";
+      id = 139;
       srvNat.enable = true;
     };
 
diff --git a/hosts/vm/reverseproxy/default.nix b/hosts/vm/reverseproxy/default.nix
index cc37e51..4c56498 100644
--- a/hosts/vm/reverseproxy/default.nix
+++ b/hosts/vm/reverseproxy/default.nix
@@ -17,7 +17,7 @@
     enable = true;
 
     networking = {
-      id = "51";
+      id = 151;
       srvNat.enable = true;
       srv = {
         enable = true;
diff --git a/hosts/vm/two/default.nix b/hosts/vm/two/default.nix
index b280e43..a87ebcd 100644
--- a/hosts/vm/two/default.nix
+++ b/hosts/vm/two/default.nix
@@ -12,7 +12,7 @@
     enable = true;
 
     networking = {
-      id = "35";
+      id = 135;
       srvNat = {
         enable = true;
         interface = "ens19";
diff --git a/hosts/vm/vaultwarden/default.nix b/hosts/vm/vaultwarden/default.nix
index 26cfe43..523b73d 100644
--- a/hosts/vm/vaultwarden/default.nix
+++ b/hosts/vm/vaultwarden/default.nix
@@ -13,7 +13,7 @@
     enable = true;
 
     networking = {
-      id = "59";
+      id = 159;
       srvNat.enable = true;
     };
 
diff --git a/modules/crans/networking.nix b/modules/crans/networking.nix
index 42b43fa..60ac51e 100644
--- a/modules/crans/networking.nix
+++ b/modules/crans/networking.nix
@@ -9,16 +9,21 @@ let
     mkOption
     types
     ;
-in
 
+  idString = toString cfg.id;
+  hostId = lib.mod cfg.id 100;
+  hostIdString = lib.fixedWidthString 2 "0" (toString hostId);
+  isVm = cfg.id >= 100;
+  isVmString = toString isVm;
+in
 {
   options.crans.networking = {
     enable = mkEnableOption "Configuration réseaux commune à toutes les machines du Crans.";
 
     id = mkOption {
-      type = types.str;
-      example = "35";
-      description = "Le numéro de la VM dans Proxmox (sans le `1` devant).";
+      type = types.int;
+      example = 135;
+      description = "Le numéro de la VM dans Proxmox.";
     };
 
     adm = {
@@ -97,14 +102,14 @@ in
               adm = {
                 ipv4.addresses = [
                   {
-                    address = "172.16.10.1${cfg.id}";
+                    address = "172.16.10.${idString}";
                     prefixLength = 24;
                   }
                 ];
 
                 ipv6.addresses = [
                   {
-                    address = "fd00::10:0:ff:fe01:${cfg.id}10";
+                    address = "fd00::10:0:ff:fe0${isVmString}:${hostIdString}10";
                     prefixLength = 64;
                   }
                 ];
@@ -130,7 +135,7 @@ in
                 ipv6 = {
                   addresses = [
                     {
-                      address = "2a0c:700:2::ff:fe01:${cfg.id}02";
+                      address = "2a0c:700:2::ff:fe0${isVmString}:${hostIdString}02";
                       prefixLength = 64;
                     }
                   ];
@@ -149,7 +154,7 @@ in
                 ipv4 = {
                   addresses = [
                     {
-                      address = "172.16.3.1${cfg.id}";
+                      address = "172.16.3.${idString}";
                       prefixLength = 24;
                     }
                   ];
@@ -165,7 +170,7 @@ in
                 ipv6 = {
                   addresses = [
                     {
-                      address = "2a0c:700:3::ff:fe01:${cfg.id}03";
+                      address = "2a0c:700:3::ff:fe0${isVmString}:${hostIdString}03";
                       prefixLength = 64;
                     }
                   ];
@@ -183,14 +188,14 @@ in
               san = {
                 ipv4.addresses = [
                   {
-                    address = "172.16.4.1${cfg.id}";
+                    address = "172.16.4.${idString}";
                     prefixLength = 24;
                   }
                 ];
 
                 ipv6.addresses = [
                   {
-                    address = "fd00::4:0:ff:fe01:${cfg.id}04";
+                    address = "fd00::4:0:ff:fe0${isVmString}:${hostIdString}04";
                     prefixLength = 64;
                   }
                 ];