Multi-Factor Authentication (MFA), Duo Prompt Display Issues
Some privacy and security features, especially on Apple devices, prevent the Duo Universal 2-factor prompt from working correctly. For example, a blank screen appears after the password is accepted, but the prompt to text or notify doesn't appear.
Ad Blockers
Some ad blockers can interfere with the Duo prompt. Disable your ad blocker and try again. If the Duo prompt displays correctly after that, you can leave the ad blocker disabled or try to adjust your ad blocker settings to get it working alongside Duo.
OS Specific Issues
iOS and iPadOS
- make sure JavaScript is enabled in Settings > Safari > Advanced > JavaScript (turn this on).
- allow cookies with the switch in Settings > Safari > Privacy & Security heading, Block All Cookies (turn this off).
- check Content Restrictions in Settings > Screen Time > Content & Privacy Restrictions > Content Restrictions > Web Content.
- if you'd like to keep using this feature, add both verify.uillinois.edu and duosecurity.com as Allowed Websites.
- otherwise, change this setting to Unrestricted.
Duo Security, the vendor the University uses for this service, describes this article in some more detail on their website here: https://help.duo.com/s/article/3710.
macOS
- check Content Restrictions in System Preferences > Screen Time > Content & Privacy > Content heading.
- if you'd like to keep using this feature, add both verify.uillinois.edu and duosecurity.com as Allowed Websites.
- otherwise, change the Web Content setting to Unrestricted Access.
Duo Security, the vendor the University uses for this service, describes this article in some more detail on their website here: https://help.duo.com/s/article/3710.