Rating: 

and a good reference on SSH configuration. The level of technical

detail is just right, not going deeply into packet structures (for

that you should read the SSH specifications) but explaining difficult

issues like port forwardings in a very clear way. The chapter on

recommended setup is very good because there are tons of configuration

options in SSH.

Jari Ollikka

SSH Development Manager

F-Secure Corporation (Creators of F-Secure SSH)