[antocv]

That was a lot of words to encourage use of authors own tool instead of or aside perhaps even with port knocking.

The article hasnt anyway delivered any meaningful reason not to use port knocking, just a few straw-man arguments such as "most people only setup 3 port sequences".

The idea presented though is an interesting one, run your ssh on one port, and when that one authenticates with any method, only then allow connections to a second ssh on another port, which has perhaps only then begun listening or being allowed to accept connections from that specific uid, and if that authenticates then the user is in. Like having two gates infront of a city instead of a secret handshake with 16 port sequences say.