sombrero: Cleanup networking/ssh

hosts/sombrero/configuration.nix

@@ -46,6 +46,9 @@
 
   networking = {
     hostName = "sombrero";
+
+    interfaces = {
+      eth0 = {
         ipv4 = {
           addresses = [{
             address = "192.168.50.200";
@@ -53,10 +56,19 @@
           }];
         };
       };
+    };
 
-  services.openssh.enable = true;
-  services.openssh.ports = [ 1122 ];
-  networking.firewall.allowedTCPPorts = [ 1122 ];
+    firewall = {
+      allowedTCPPorts = [ 1122 ];
+    };
+  };
+
+  services = {
+    openssh = {
+      enable = true;
+      ports = [ 1122 ];
+    };
+  };
 
   users = {
     mutableUsers = false;