Book Image

CentOS 7 Server Deployment Cookbook

By : Timothy Boronczyk, IRAKLI NADAREISHVILI
Book Image

CentOS 7 Server Deployment Cookbook

By: Timothy Boronczyk, IRAKLI NADAREISHVILI

Overview of this book

CentOS is derived from Red Hat Enterprise Linux (RHEL) sources and is widely used as a Linux server. This book will help you to better configure and manage Linux servers in varying scenarios and business requirements. Starting with installing CentOS, this book will walk you through the networking aspects of CentOS. You will then learn how to manage users and their permissions, software installs, disks, filesystems, and so on. You’ll then see how to secure connection to remotely access a desktop and work with databases. Toward the end, you will find out how to manage DNS, e-mails, web servers, and more. You will also learn to detect threats by monitoring network intrusion. Finally, the book will cover virtualization techniques that will help you make the most of CentOS.
Table of Contents (18 chapters)
CentOS 7 Server Deployment Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Setting up a slave DNS server


Redundancy is important to ensure key services remain available in the event of an issue. As DNS is one of the most critical components of a network, whether it's a private intranet or the public Internet, having only one authoritative DNS server is unwise. In fact, IANA's Technical Requirements for Authoritative Name Servers document states that there must be a minimum of two different authoritative name servers for the zone. This recipe shows you how to configure a second BIND installation to act as a secondary authoritative server that receives its zone information from the primary in a master/slave configuration. A lookup request can then be satisfied by either server and be considered an authoritative response.

Getting ready

This recipe requires two CentOS systems with BIND installed and configured as described in earlier recipes. Use the network described by the Configuring BIND as an authoritative DNS server recipe. This recipe assumes that the system to...