Introduction
In the GlobalProtect app, tap the round button with a shield on it.
Instructions
1) Open the GlobalProtect app.
2) Tap the round button with a shield on it.
Outcome
You have disconnected from TTUnet VPN on your Apple device.
TIP: From anywhere on your iPhone or iPad, you can access Control Center to see if you're connected to VPN. You will see a VPN status indicator in the status bar along the top of your screen in Control Center.