Duo & GlobalProtect: Troubleshooting Blank Login Screens and Cookie access

Duo (and therefore the GlobalProtect VPN) require cookies and javascript in order to function. If these are blocked, you may see a blank screen when you try to log in.

Operating System Settings

Browser Settings

NOTE: The GlobalProtect VPN uses specific browsers in the background: Internet Explorer (Windows 10, even if Edge is available), Microsoft Edge (Windows 11), Safari (macOS and iOS), and Chrome (Android only).

Where to find the key browser settings you'll need:

  • Chrome on computers and Android devices: allow cookies and enable javascript (3-dot menu > settings > Site Settings > JavaScript)
  • Chrome on iOS: Cookies and javascript are automatically enabled.
    NOTE: Chrome for iOS blocks one specific cookie that allows for the "remember me for 60 days" option. This is an issue created by Apple requirements that developers use WebKit to build browsers, and Webkit blocks this particular cookie.
  • GlobalProtect Login Screen on iOS: There is currently no way to enable the cookies that are required for "remember me" on an iPhone or iPad when logging into the VPN. See the note on Chrome above.
  • Internet Explorer (Windows 10 and earlier): allow cookies and enable javascript
  • Firefox: allow cookies and enable javascript
  • Microsoft Edge: allow cookies and enable javascript
  • Safari for macOSallow cookies (and be sure that "Prevent cross-site tracking" is unchecked) and enable javascript
  • Safari for iOS: tap Settings > Safari and check to make sure that the Block All Cookies and Prevent Cross-Site Tracking options are turned off, then go to Settings > Safari > Advanced and make sure that JavaScript is turned on
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Details

Article ID: 138502
Created
Thu 10/7/21 2:18 PM
Modified
Tue 4/4/23 4:07 PM

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