Book Image

Mastering Palo Alto Networks - Second Edition

By : Tom Piens aka Piens aka 'reaper'
Book Image

Mastering Palo Alto Networks - Second Edition

By: Tom Piens aka Piens aka 'reaper'

Overview of this book

Palo Alto Networks’ integrated platform makes it easy to manage network and cloud security along with endpoint protection and a wide range of security services. This book is an end-to-end guide to configure firewalls and deploy them in your network infrastructure. You will see how to quickly set up, configure and understand the technology, and troubleshoot any issues that may occur. This book will serve as your go-to reference for everything from setting up to troubleshooting complex issues. You will learn your way around the web interface and command-line structure, understand how the technology works so you can confidently predict the expected behavior, and successfully troubleshoot any anomalies you may encounter. Finally, you will see how to deploy firewalls in a cloud environment, and special or unique considerations when setting them to protect resources. By the end of this book, for your configuration setup you will instinctively know how to approach challenges, find the resources you need, and solve most issues efficiently.
Table of Contents (18 chapters)
16
Other Books You May Enjoy
17
Index

The rollback procedure

If the upgrade causes unexpected issues and troubleshooting is unable to clarify why, the last resort is to roll back to the previous deployment.

If you find yourself in this situation, make sure you do the following:

  • Write down all the symptoms.
  • Note down which troubleshooting steps were taken.
  • In Device | Support, create a Techsupport file as you may need to reach out to Palo Alto Networks support if you are unable to find what went wrong.
  • Save any related files, the CLI output, troubleshooting files, packet captures, and so on in one location.

Once you’ve documented your troubleshooting efforts, the easiest way to roll back is to switch the sysroot boot partition. The firewall has two system volumes that contain a fully installed PAN-OS, of which only one partition is active. The inactive partition either contains the previously installed version, or the next version if you have just installed it but not rebooted...