Broadband Tech > Security > Security > Is Portknocking "Real" Security?

said by EGeezer:

Based on what I've read here, it appears that portknocking can be a useful part of an SSH implementation. While there were several general non-technical analogies presented, none seemed to address the methods a hacker might use to discover and obtain the port knocking sequence in a public network.

I was hoping to see an answer to the scenario I referenced in my earlier post, but that appears not to be forthcoming. Perhaps there is no practical way.

One question, though - how would one build an IP table for the IP authorization if the clients are road warriors using DHCP? Seems that option would not be useful in that case.

... I was thinking more along the lines of a port being accessible by everyone whenever a single user entered the correct port sequence for access. Obviously I forgot that iptables can allow access to ports on a per IP address after a port knocking sequence. Hence, my previous questions do not apply. So it's possible to have thousands of users access a service remotely, but no indication to others that a remote service is listening on a certain port.