Palo Alto Networks Knowledgebase: SSH inaccessible after Upgrading WF-500 to PAN-OS 8.0.5 or above
SSH inaccessible after Upgrading WF-500 to PAN-OS 8.0.5 or above
Created On 02/08/19 00:00 AM - Last Updated 02/08/19 00:01 AM
Zone and DoS Protection
There can be a situation when upgrading the PAN-OS on WF-500 hardware, running PAN-OS 7.1.x or below and upgrading directly to 8.0.5or above, that you may run into an issue which causes ssh to become inaccessible after the upgrade.
The current workaround is to install PAN-OS 8.0.4 first, then upgrade to 8.0.5 or above. This upgrade path avoids the issue which causes the loss of ssh access.
Steps to take if ssh access is lost:
If after upgrading you lose ssh access, connect to the WF-500 via console cable.
Boot in maintenance mode by typing “maint” after interrupting the boot process.
Select the previous disk image used prior to upgrade (7.1.x) and select reboot.
This should restore ssh access to the WF-500 and allow you to continue to upgrade.
Thank you for your patience and understanding as we investigate the cause of this issue.