Alternatively, you can directly go to: https://support.paloaltonetworks.com/Updates/SoftwareUpdates
After clicking on a PAN-OS version (e.g., 10.2.3), you’ll see a page listing available file types: palo alto download vm image
You will see a list of versions (e.g., 10.2.x, 11.0.x, 11.1.x). Alternatively, you can directly go to: https://support
To download a Palo Alto VM-Series image, you must typically have an active customer or partner account with valid entitlements. Where to Download palo alto download vm image