first building version of lpt2 as flake

common/networking.nix

@@ -0,0 +1,23 @@
+{...}: {
+  config = {
+    services.openssh = {
+      enable = true;
+      openFirewall = true;
+      settings = {
+        PermitRootLogin = "without-password";
+        PasswordAuthentication = false;
+        KbdInteractiveAuthentication = false;
+      };
+    };
+
+    services.tailscale = {
+      enable = true;
+      openFirewall = true;
+    };
+
+    networking.firewall = {
+      enable = true;
+      checkReversePath = "loose";
+    };
+  };
+}