refactor, ssh changes

host/roam/services/networking.nix

@@ -0,0 +1,28 @@
+{ ... }:
+{
+  networking = {
+    enableIPv6 = true;
+
+    interfaces = {
+      "ens3".ipv6.addresses = [
+        {
+          address = "2a03:4000:3b:f99::";
+          prefixLength = 64;
+        }
+      ];
+    };
+
+    defaultGateway6 = {
+      address = "fe80::1";
+      interface = "ens3";
+    };
+
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [
+        80
+        443
+      ];
+    };
+  };
+}