DUO Prompt Issues (iOS / macOS)

Tags macos ios NETID


While logging in to a Duo-protected website or application on any iOS or macOS devices, the Duo Prompt displays an error message saying, "You cannot browse this page at 'duo.com' because it is restricted" or displays a gray box instead of the prompt. This article has the instructions to fix this error. 

Enabling JavaScript in Safari 

  • Open Safari.
  • In the top toolbar, select Safari.
  • In the dropdown menu, click Preferences.

Preferences option in dropdown menu.

  • Toggle over to the Security tab.

Security tab in Preferences settings.

  • Check the box next to "Enable JavaScript".

Checkbox next to the Enable JavaScript option.

Disabling Content Restrictions

For iOS 12 or Newer

  • Navigate to Settings.
  • Click on Screen Time.

Screen Time option under Settings in iOS.

  • Select Content & Privacy Restrictions.

Content & Privacy Restrictions option in iOS.

  • Tap on Content Restrictions.

Content Restrictions option in iOS.

  • Click on Web Content.

Web Content option in iOS.

  • Uncheck Limit Adult Websites to completely disable content restrictions. 

Limit Adult Websites option in iOS to completely enable/disable content restrictions.

For macOS 10.15 (Catalina) or Higher

  • Open System Preferences.
  • Click on Screen Time

Screen Time option under System Preferences in MacOS.

  • Select Content & Privacy.

Content & Privacy option in MacOS.

  • Set any Web Content restrictions to Unrestricted access. 

Option to set Web Content restrictions.

Note: If you do not want to completely disable content restrictions, you can allow duosecurity.com within the Content Restrictions page on the iOS device or to the Allowed Websites Only list on MacOS. This will allow the Duo Prompt to display even if content restrictions are enabled.


Article ID: 187
Mon 11/22/21 12:43 PM
Mon 10/2/23 12:26 PM

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Duo is the university two-factor authentication method designed to add a second layer of security to your NetID account. Verifying your identity using a second factor, such as your phone or a security key, prevents anyone but you from logging in, even if they know your password.