Davidson College Knowledge Base Duo Two-Factor Authentication Duo Troubleshooting Updated February 15, 2018 22:06 LABELS: two-factor two factor multifactor Duo Security two step authentication 2Fa If you are having difficulties with Duo, read about some of the common issues below to help troubleshoot. Are you currently traveling abroad? If you are abroad, and you are a required Duo user, you have to use VPN to authenticate. Read this article for more details. If you are using Duo Mobile, does your phone have a screen lock? For security reasons, Duo requires that your phone have some type of screen lock, whether it’s a pattern, passcode, etc. Are your browser, plugins, and OS up-to-date? Duo requires that you keep your chosen browser, plugins, and OS up-to-date in order to authenticate. Read our article on Duo requirements for your browsers, plugins, and OS’s. Is your Duo Mobile app updated? We require that you have up-to-date security patches for Duo Mobile. Comments 0 comments Article is closed for comments.