2 Factor Authentication for Anyconnect VPN using ISE

Question

We are planning to implement dual factor authentication for Anyconnect VPN.
The end users will be authenticated using domain name in machine certificates and username password with
ISE used as radius server.
We have the following approaches to achieve this :-
1. Use primary and secondary authentication with user credentials as primary authentication
and CN field of the certificate as secondary authentication.However this option prompts users for password for
both the fields while we want the machine certificate to authenticate itself without a password.
2. Second approach is to authenticate using user credentials and authorize the user to access the network if
the machine certificate has a domain name in CN field which we are able to validate from the AD using
Dynamic Access Policy.
We are looking forward for discussions on the above approaches and are open to any other
solution.

Answer 1

Hi Umahar,
Not sure I understood correct. You would like to authenticate the user using machine certificate for anyconnect and want to extract CN attribute the client's certificate and send it to the ISE server for further authenticate with AD. And also you don't want an additional password prompt to be produced to the user.
If my understanding is correct. Then user would get a prompt for the password atleast because in the machine certificate there won't be password, but to authenticate with RADIUS/TACACS , we need both username and password. So how will the user gets authenticated without password.
If you are looking a way to just see if the user is present under AD, not exactly and authentication then this might not be possible.