Ports found to be CLOSED:1024, 1025, 1026, 1027, 1028, 1029, 1030 How can I stealth them? Thanks

I activated Firewalld and checked if all first ports where stealth, and unfortunately ports 1024 to 1030 where only closed, failing the security test, the rest of the ports from 0 to 1023 where stealth. How can I stealth ports 1024 to 1030?
Thanks and regards.