diff --git a/configuration.nix b/configuration.nix
index e8fee2c..72c183f 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -14,20 +14,31 @@
     value = "8192";
   }];
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
+  nix.settings.trusted-users = [ "administration" ];
   nix.settings.download-buffer-size = 6710886400;
-  boot.loader.grub.enable = true;
+  # boot.loader.grub.enable = true;
   boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only
+  boot.loader.grub.enable = true;
+  boot.loader.grub.efiSupport = true;
+  boot.loader.grub.efiInstallAsRemovable = true;
 
   networking.hostName = "authentik";
   networking.domain = "test.htw.stura-dresden.de";
   networking.interfaces.ens18.ipv4.addresses = [
     {
-      address = "141.56.51.18";
-      prefixLength = 24;
+      address = "167.235.225.23";
+      prefixLength = 32;
     }
   ];
-  networking.defaultGateway.address = "141.56.51.254";
-  networking.nameservers = [ "141.56.1.1" "141.56.1.2" ];
+
+  networking.interfaces.ens18.ipv6.addresses = [
+    {
+      address = "2a01:4f8:c012:6bd7::1";
+      prefixLength = 32;
+    }
+  ];
+  networking.defaultGateway.address = "172.31.1.1";
+  networking.nameservers = [ "9.9.9.9" "1.1.1.1" ];
 
   time.timeZone = "Europe/Berlin";
 
@@ -40,7 +51,8 @@
 
   users.users.administration = {
     isNormalUser = true;
-    extraGroups = [ "wheel" "docker" ]; # Enable ‘sudo’ for the user.
+    initialPassword = "test";
+    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
     openssh.authorizedKeys.keys = [
       "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINABEf0jBjtDdezDDtvl1v27l0DbHP2XUgMARTZXC+MR goeranh@node5"
       "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDmYHNdtPmQqvNINEWJgqEojrye+wQKr0S0VwlGv7xUa goeranh@node7"
@@ -157,7 +169,7 @@
   };
 
   services.dovecot2.mailLocation = lib.mkForce "maildir:/var/vmail/%n";
-  services.postfix.relayHost = "141.56.51.14";
+  # services.postfix.relayHost = "141.56.51.14";
 
 
   # virtualisation.docker.enable = true;