Open your browser and go to the following URL: https://vpn.harvard.edu
At the login screen you will be prompted to authenticate with your Harvard Key credentials and click Sign In
Follow the on-screen instructions to download and install the software.
After the installation, you may launch Cisco AnyConnect VPN Client from your Start menu (Windows) or Applications folder if you are on OSX
Once launched, make sure vpn.harvard.edu is entered in the Connect dialog box. Next, you will be prompted for your Harvard Key in conjunction with two-step verification.
For more information about the University’s VPN service, visit their IT Help knowledge base article