On the door frame, on the door, door knocker, bell.
Loud, very loud, regular, soft... gentle... or just pretended and never knocked at all?
We just had a City worker come a knocking on our front door and my responce after she left was, she should go down to the local kingdom haul and give lessons. Her knock was so loud, she could raise the dead. lol She must have hurt her hand/ knuckle. It really was loud.
I wanted a friendly response... So I usually gave a happy tap tap tap tap tap... tap tap.
In all my years in, I only had one guy threaten me with a gun... And I never even made it to his porch!