IAS Server and Cisco VPN Concentrator

Hello,

We are presently testing a Cisco 3020 VPN Concentrator to replace our
existing VPN solution. One of the things we would like to roll out is some
two factor authentication with our Active Directory. Has anyone deployed
MS's RADIUS solution of IAS Server in conjunction with a Cisco 3020 VPN
Concentrator? Do we simply configure the IAS service on one of our internal
AD domain controllers? What type of ports do we have to open up from the
DMZ where Concentrator resides to our internal AD? Any input would be
greatly appreciated.

Regards


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