Pass traffic through genesis

* keepalived does not work with Nebula VPN
* update Genesis firewall to allow passing through local traffic
* target all traffic directly to the LAN IP using genesis's routing

hosts/unstable/genesis/networking.nix

@@ -77,7 +77,7 @@ in
       };
     };
     firewall = {
-      enable = false;
+      enable = true;
       allowedUDPPorts = [
         dhcpPort
         dnsPort
@@ -88,7 +88,7 @@ in
         80
       ];
     };
-    nftables.enable = false;
+    nftables.enable = true;
   };
 
   environment.etc."hosts.d/local".text = extraHosts;