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

Filtering captured traffic

The first thing that you will notice when using a packet capture tool is the sheer volume of packets that appear on the display. Since packet captures are often done for troubleshooting purposes, you usually want to limit the packets to the ones that have issues you need to solve. To that end, you typically either want to "filter" those packets during the capture process or filter the display of the packets once they have been captured. Let's discuss both situations.

Wireshark capture filters (capturing your home network traffic)

With no particular switch configuration, packet captures on your home network will find more than you might think. Lots of homes these days have a small herd of network-connected Linux-based appliances – if connected, your TV, thermostat, doorbell, treadmill, and fridge are likely all Linux hosts. These are commonly referred to as Internet of Things (IoT) devices. Almost all IoT hosts are likely broadcasting...