CIT is migrating Cornell Department VPN’s to Two Factor Authentication between now and 12/31/2020: https://it.cornell.edu/news/two-step-login-requirement-departmental-vpns/20201116
Directions on how to use Two Factor Authentication for VPN can be found here: Windows, Macintosh, Linux, and mobile devices
If you are not already setup for Two Factor Authentication, please follow these steps: