How to use a Duo Token for VPN (TCS) Open Cisco AnyConnect and click Connect. Supply your credentials that IT provided you and click OK. You will be asked to supply a passcode from your DUO hardware token. Press the green button on your DUO hardware token to generate a passcode. Apply the code generated from the hardware token to the answer textbox on the VPN. When complete you will be connected to the VPN. This can be validated by the green checkmark next to the lock.