> The thing about port knocking is that if you're on a host where you don't have the ability to port-knock, then you're not able to connect. Then you attach a

> The thing about port knocking is that if you're on a host where you don't have the ability to port-knock, then you're not able to connect. Then you attach a device that can have port knocking to that unsupported host. Also, I remember it was called port punching not knocking.