|  |  | Step 4. CiscoSecure ACS for Windows NT Configuration-Device Configuration. The NAS, PIX Firewall, and dial-up client PCs must be configured to work with CiscoSecure ACS. Token card servers must also be configured to work with CiscoSecure ACS to perform AAA. All devices that send and receive a response to the CiscoSecure ACS must have their configurations changed to point to the CiscoSecure ACS.