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Yes, TFA is supported. We followed this article to implement:https://www.cisco.com/c/en/us/support/docs/security/firepower-management-center/214756-configure-duo-two-factor-authentication.html
Be sure to first type "enable" under the interface configuration. You must use port 9 for 40GB sup connection when wanting to use the 40GB port. Check that you are following the below guidelines:http://www.data-holic.com/uploads/products_files/data_h...
