diff --git a/kuro/configuration.nix b/kuro/configuration.nix
index b8807c8..aaeb0c9 100644
--- a/kuro/configuration.nix
+++ b/kuro/configuration.nix
@@ -14,19 +14,21 @@
       /data/nixos/common.nix
     ];
 
-  # host name
-  networking.hostName = "kuro";
-
-  # main network interface via systemd-networkd
-  networking.useDHCP = false;
-  systemd.network.enable = true;
-  systemd.network.networks."10-lan" = {
-    matchConfig.Name = "enp2s0";
-    networkConfig.DHCP = "yes";
-    linkConfig.RequiredForOnline = "routable";
-  };
-
   # amd graphics
   hardware.opengl.extraPackages = with pkgs; [ amdvlk rocm-opencl-icd rocm-opencl-runtime ];
-  hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [ amdvlk ];
+
+  # use systemd-networkd, fixed IPv4, dynamic IPv6
+  networking.hostName = "kuro";
+  networking.useDHCP = false;
+  networking.nameservers = [ "192.168.13.1" ];
+  systemd.network = {
+    enable = true;
+    networks."10-wan" = {
+      matchConfig.Name = "enp2s0";
+      address = [ "192.168.13.101/24" ];
+      routes = [ { routeConfig.Gateway = "192.168.13.1"; } ];
+      networkConfig.IPv6AcceptRA = true;
+      linkConfig.RequiredForOnline = "routable";
+    };
+  };
 }
diff --git a/kuro/hardware-configuration.nix b/kuro/hardware-configuration.nix
index 135dacc..26da79b 100644
--- a/kuro/hardware-configuration.nix
+++ b/kuro/hardware-configuration.nix
@@ -20,24 +20,23 @@
     };
 
   fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/03B1-533D";
+    { device = "/dev/disk/by-uuid/263D-A89E";
       fsType = "vfat";
     };
 
-  boot.initrd.luks.devices."crypt-disk1".device = "/dev/disk/by-uuid/3009a0b5-3d8a-48e3-88a7-2a27a928b648";
-  boot.initrd.luks.devices."crypt-disk1".allowDiscards = true;
-  boot.initrd.luks.devices."crypt-disk1".bypassWorkqueues = true;
+  # system
+  boot.initrd.luks.devices."crypt-system".device = "/dev/disk/by-uuid/f4af1379-93d2-4903-9fb5-5b767d733c66";
 
   fileSystems."/nix" =
-    { device = "/dev/mapper/crypt-disk1";
+    { device = "/dev/mapper/crypt-system";
       fsType = "btrfs";
-      options = [ "subvol=nix" "noatime" "compress=zstd" ];
+      options = [ "subvol=nix" "noatime" "nodiratime" ];
     };
 
   fileSystems."/data" =
-    { device = "/dev/mapper/crypt-disk1";
+    { device = "/dev/mapper/crypt-system";
       fsType = "btrfs";
-      options = [ "subvol=data" "noatime" "compress=zstd" ];
+      options = [ "subvol=data" "noatime" "nodiratime" ];
     };
 
   fileSystems."/home" =
@@ -58,8 +57,6 @@
       options = [ "bind" ];
     };
 
-  swapDevices = [ ];
-
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 }