said by GeekNJ:
You selected Reject vs Drop. The description indicates Reject is Drop and send TCP Reset or ICMP Host Unreachable packets to sender.
Is there a need to send back the response?
The browser will react to REJECT faster since it knows the connection failed and won't wait for a timeout or keep retrying. You can go with whichever you prefer.
I always use REJECT because DROP can dramatically slow down applications. DROP should not normally be used anyway.