Book Image

Linux for Networking Professionals

By : Rob VandenBrink
1 (1)
Book Image

Linux for Networking Professionals

1 (1)
By: Rob VandenBrink

Overview of this book

As Linux continues to gain prominence, there has been a rise in network services being deployed on Linux for cost and flexibility reasons. If you are a networking professional or an infrastructure engineer involved with networks, extensive knowledge of Linux networking is a must. This book will guide you in building a strong foundation of Linux networking concepts. The book begins by covering various major distributions, how to pick the right distro, and basic Linux network configurations. You'll then move on to Linux network diagnostics, setting up a Linux firewall, and using Linux as a host for network services. You'll discover a wide range of network services, why they're important, and how to configure them in an enterprise environment. Finally, as you work with the example builds in this Linux book, you'll learn to configure various services to defend against common attacks. As you advance to the final chapters, you’ll be well on your way towards building the underpinnings for an all-Linux datacenter. By the end of this book, you'll be able to not only configure common Linux network services confidently, but also use tried-and-tested methodologies for future Linux installations.
Table of Contents (20 chapters)
1
Section 1: Linux Basics
4
Section 2: Linux as a Network Node and Troubleshooting Platform
8
Section 3: Linux Network Services

A final note on load balancer security

So far, we've discussed how an attacker might be able to gain insight or access to the internal network if they can get server names or IP addresses. We discussed how a malicious actor can get that information using information disclosed by the cookies used in a local balancer configuration for persistent settings. How else can an attacker gain information about our target servers (which are behind the load balancer and should be hidden)?

Certificate transparency information is another favorite method for getting current or old server names, as we discussed in Chapter 8, Certificate Services on Linux. Even if the old server names are no longer in use, the records of their past certificates are immortal.

The Internet Archive site at https://archive.org takes "snapshots" of websites periodically, and allows them to be searched and viewed, allowing people to go "back in time" and view older versions of your infrastructure...