Putty ssh no wait before entering password

Open up a terminal window and edit the OpenSSH config file.

sudo vi /etc/ssh/sshd_config

At the end, paste this in:

# Fix slow login times
UseDNS no

Save and exit.
Now restart your OpenSSH daemon. You can do it while connected via SSH.

sudo /etc/init.d/ssh restart

That's it! It should now connect almost immediately.