add iptables settings for oracle reboot

modules/services/oracle.nix

@@ -0,0 +1,9 @@
+{ pkgs, ... }: {
+
+  # Needs to be run at boot for Oracle firewall
+  systemd.services.openIpTables = {
+    script = "${pkgs.iptables}/bin/iptables -I INPUT -j ACCEPT";
+    wantedBy = [ "multi-user.target" ];
+  };
+
+}