Hello guys .. as you know that someone could know the version of the sshd and many other information by using nmap or any other tools …

for example 

root::qnix[0]@~/Codeing/Projects/SSHDH/openssh-4.7p1 $ nmap -q -sV -p 22 localhost
Starting Nmap 4.53 ( http://insecure.org ) at 2008-02-25 15:35 AST
Interesting ports on localhost (127.0.0.1):
PORT   STATE SERVICE VERSION
22/tcp More >