merits of portknocking (was: More SSH 'trolling')

[Lew Bloch]

The more I hear here and read elsewhere, the more I moderate my position 
- I do see usefulness in it, but I still don't plan to use it.

I agree that "security through obscurity" is a useful, if small, part of 
"security in depth".

In my case I don't choose to use portknocking, but now that I've 
researched more about it, including rebuttals to some of the criticisms, 
I've come to appreciate it better.  I might use it under the right 
circumstances.