> But I can not login with command "ssh <valid_user_name>@<host_name>"
> the message I got :
> 
> $ ssh -v steve@fw2
> OpenSSH_2.5.1 NetBSD_Secure_Shell-20010614, SSH protocols 1.5/2.0, OpenSSL 0x0090581f

...

> steve@fw2's password:
> Permission denied, please try again.

Steve,

Can you try starting your sshd server in debug mode?

You can use "-d -d -d" for maximum debugging output. (Or set the LogLevel
directive to DEBUG. See the sshd manual page for more info.)

Maybe the output can tell us a little more. (You may want to also reply to
gnats-bugs so it is included with your PR.)

   Jeremy C. Reed
   http://www.reedmedia.net/