How to Restore Palo Alto Network Device Previous Configuration
Restore Previous Config through Console
Connect to the console via the console port and Hyper terminal software.
Reboot the firewall and keep pressing ‘m‘ (or ‘maint’ for newer versions).
Once you load into maintenance mode, continue to the ‘Select Running Config‘ option.
Choose a previous version of the running config file and reboot the device with this config.
Restore Through Web GUI
For PAN-OS 5.0 and above:
Open the Device > Setup > Operations
Click on a command from the Load or Revert section on the page.