diff --git a/modules/nixos/my_k3s/default.nix b/modules/nixos/my_k3s/default.nix
index 1366e47..39e2968 100644
--- a/modules/nixos/my_k3s/default.nix
+++ b/modules/nixos/my_k3s/default.nix
@@ -27,6 +27,10 @@ in
       type = types.nonEmptyStr;
       default = "server";
     };
+    extraFlags = mkOption {
+      type = types.listOf types.str;
+      default = [];
+    };
   };
 
   config = mkIf cfg.enable {
@@ -36,6 +40,7 @@ in
       tokenFile = cfg.tokenFile;
       clusterInit = cfg.clusterInit;
       serverAddr = cfg.serverAddr;
+      extraFlags = cfg.extraFlags;
     };
     environment.systemPackages = [ pkgs.nfs-utils ];
     services.openiscsi = {
diff --git a/systems/x86_64-linux/penguin/default.nix b/systems/x86_64-linux/penguin/default.nix
index 5fd7e72..5a000a6 100644
--- a/systems/x86_64-linux/penguin/default.nix
+++ b/systems/x86_64-linux/penguin/default.nix
@@ -25,7 +25,15 @@ in
     my_k3s = {
       enable = true;
       tokenFile = config.age.secrets.k3s.path;
-      serverAddr = "10.222.0.13:6443";
+      serverAddr = "https://10.222.0.13:6443";
+      extraFlags = [
+        "--disable=servicelb"
+        "--disable=traefik"
+        "--node-ip 10.222.0.249"
+        "--flannel-iface ztxh6lvd6t"
+        "--flannel-backend=host-gw"
+        "--tls-san 10.222.0.249"
+      ];
     };
     networking.hostName = "penguin";