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

Installing and configuring a DHCP server

We'll break the configuration tasks up into three sections:

  • The basic configuration of the DHCP server and scopes
  • Static reservations for DHCP leases – for instance, for servers or printers.
  • Using DHCP logs for network intelligence and inventory checks or population

Let's get started.

Basic configuration

As you would expect, we'll start our journey with the apt command, installing the ISC DHCP server on our lab host:

$ sudo apt-get install isc-dhcp-server

Once installed, we can configure the basic server options. Set the lease times and anything that isn't scope-dependent – we'll configure central DNS servers for instance. Also, note that we're adding a ping check – before a lease is assigned, this host pings the candidate address to be sure that someone else doesn't have it statically assigned, for instance. This is a great check for avoiding duplicate...