Book Image

Mastering Palo Alto Networks

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

Mastering Palo Alto Networks

By: Tom Piens aka Piens aka 'reaper'

Overview of this book

To safeguard against security threats, it is crucial to ensure that your organization is effectively secured across networks, mobile devices, and the cloud. 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. With this book, you'll understand Palo Alto Networks and learn how to implement essential techniques, right from deploying firewalls through to advanced troubleshooting. The book starts by showing you how to set up and configure the Palo Alto Networks firewall, helping you to understand the technology and appreciate the simple, yet powerful, PAN-OS platform. Once you've explored the web interface and command-line structure, you'll be able to predict expected behavior and troubleshoot anomalies with confidence. You'll learn why and how to create strong security policies and discover how the firewall protects against encrypted threats. In addition to this, you'll get to grips with identifying users and controlling access to your network with user IDs and even prioritize traffic using quality of service (QoS). The book will show you how to enable special modes on the firewall for shared environments and extend security capabilities to smaller locations. By the end of this network security book, you'll be well-versed with advanced troubleshooting techniques and best practices recommended by an experienced security engineer and Palo Alto Networks expert.
Table of Contents (18 chapters)
1
Section 1: First Steps and Basic Configuration
4
Section 2: Advanced Configuration and Putting the Features to Work
10
Section 3: Maintenance and Troubleshooting

Custom applications and threats

Every once in a while, an application may not be known. This could be due to it being a new application that has not been used much in the wild or could be something a developer created in-house for which it is not reasonable to expect there to be signatures to identify the session. In these cases, it is possible to create custom applications that use custom signatures and can trigger an App-ID to positively identify the previously unknown application.

The need for a custom application usually starts with the discovery of an abnormality in the traffic log. In the following screenshot, I have discovered my solar power converter, and an IoT device is communicating with its home server over an unknown-tcp connection:

Figure 10.12 – An unknown-tcp application in the traffic log

There are two ways to address this issue:

  • Implement an application override that forcibly sets all these sessions to a specific application...