SSH Client PC that has not been registered.

[Lukas Leonardo]

I have two Linux server with Open SSH and get no problem with them.

I tried "SSH Secure Shell 2.1.0 (Build 111)" client for win'9x. It can
login to my Server  with password. My question is how to reject such
service at my server because I have not put this client's key at server
but server accept it as long as the password is true? So I want to avoid
some body that know a user password and use such SSH client from a
computer that host key has not been registered at server.


Thank You