- ASDM is already installed
- You know the password to the ASA
You will also have to generate the ssh key. Type the following from ASDM or through a console connection to the ASA.
ca generate rsa key 1024
**NOTE: If you see error messages like below, then the key wasn't completed correctly or you skipped that step.***
ssh_exchange_identification: Connection closed by remote host
Fail to establish SSH session because RSA host key retrieval failed.
Now you need to configure the authentication piece of remote access for the connection. On the left side select Users/AAA -> AAA Access. Under the Authentication Tab, Check SSH and select Server Group: LOCAL. This will allow you authenticate with a local user account on the ASA while connection through SSH. I have not tested this authenticating it against Active Directory, but I would imagine you can do this by setting up a AAA group and selected it instead of the LOCAL group.
At the time of writing my ASA was running 8.2(1) and ASDM 6.2(1).