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
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17
Index

A Deep Dive into Troubleshooting

In this chapter, we will learn how a session is formed and how flows traverse the firewall. We will learn how to interpret global counters and take things a step further to look at all the stages that a packet goes through between entering and leaving the firewall. We will see how sessions are set up and how packets are handled at every step.

In this chapter, we’re going to cover the following main topics:

  • Understanding global counters
  • Analyzing session flows
  • Debugging processes
  • CLI troubleshooting commands cheat sheet

By the end of this chapter, you’ll be able to analyze all the phases a packet and a session go through while traversing the firewall, and figure out what might be going wrong.