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

Collecting NetFlow data on Linux

What do you do when looking at interface throughput isn't enough? Quite often, those SNMP throughput graphs will tell you that you have a problem, but won't take you to that next step – what protocol or which people are eating up all that bandwidth? Is this something I can fix with configuration, or do I need to work on policies to help control the video habits of the people in my organization, or do I truly need more bandwidth?

How can we get this information? It's not as easy as SNMP, but NetFlow collects all the information you might need to help be a "bandwidth detective." Let's discuss how this works, and what protocols are involved.

What is NetFlow and its "cousins" SFLOW, J-Flow, and IPFIX?

If you recall back in Chapter 3, Using Linux and Linux Tools for Network Diagnostics, and again in Chapter 11, Packet Capture and Analysis in Linux, where we discussed packet "tuples," this...