If you have recently tried to setup SSH access on a new ASA, it might not have worked the way you wanted. That is because the RSA keys need to be generated first. To do that:
INFO: The name for the keys will be:
Keypair generation process begin. Please wait…
And then configure SSH to be allowed from the inside interface:
Now you will be able to login using the default username and password of pix/cisco, Or you can configure AAA and setup your own usernames. Doing this will make the pix username no longer work for SSH.
First, a username needs to be created:
And then configure AAA: