I have configured a Cisco 515E PIX for remote access VPN connections using PSK as the authentication type. I would like to be able to add dual factor authentication so the users would require a certificate to VPN into the PIX. I can't find much doco on this topic can anyone point me in the right direction, I would rather configure it using cli but I have access to the asdm. The VPN is working fine at the moment with just the one authentication method.
Thanks in advance.