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

Putting the firewall in-line

Simply configuring the firewall is not enough: a cloud environment behaves quite differently from a traditional network. If you haven’t deployed many firewalls in a cloud setting before, the most important considerations will be listed below. We will focus on Azure in this section to stay in line with the previous sections. Other cloud vendors have similar processes.

When the firewall is created, one of the additional objects that gets created in Azure is the DefaultNSG. An NSG, or Network Security Group, is the firewall component in Azure networking that creates an inbound bridge from the internet. This means any subnet in the VNET that is not added to the NSG will not be able to receive connections from the internet.

In addition to being a member of the NSG, a public IP address object is required to receive incoming connections, which are mapped to either an interface or a load balancer.

The default deployment only has the management...