To guarantee high-availability in your network, it can be useful to operate more than one DNS server in your environment to catch up with any server failures. This is particularly true if you run a public DNS server where continuous access to the service is crucial and where it is not uncommon to have five and more DNS servers at once. Since configuring and managing multiple DNS servers can be time consuming, the BIND DNS server uses the feature of transferring zone files between the nodes so that every DNS server has the same domain resolving and configuration information. In order to do this, we need to define one primary and one or more secondary or slave DNS servers. Then we only have to adjust our zone file once on the primary server which will transfer the current version to all our secondary servers, keeping everything consistent and up-to-date. For a client it will then make no difference which DNS server they are connecting to.
CentOS 7 Linux Server Cookbook - Second Edition
By :
CentOS 7 Linux Server Cookbook - Second Edition
By:
Overview of this book
This book will provide you with a comprehensive series of starting points that will give you direct access to the inner workings of the latest CentOS version 7 and help you trim the learning curve to master your server.
You will begin with the installation and basic configuration of CentOS 7, followed by learning how to manage your system, services and software packages. You will then gain an understanding of how to administer the file system, secure access to your server and configure various resource sharing services such as file, printer and DHCP servers across your network. Further on, we cover advanced topics such as FTP services, building your own DNS server, running database servers, and providing mail and web services. Finally, you will get a deep understanding of SELinux and you will learn how to work with Docker operating-system virtualization and how to monitor your IT infrastructure with Nagios.
By the end of this book, you will have a fair understanding of all the aspects of configuring, implementing and administering CentOS 7 Linux server and how to put it in control.
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CentOS 7 Linux Server Cookbook - Second Edition
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Table of Contents (22 chapters)
CentOS 7 Linux Server Cookbook Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
Installing CentOS
Configuring the System
Managing the System
Managing Packages with YUM
Administering the Filesystem
Providing Security
Building a Network
Working with FTP
Working with Domains
Working with Databases
Providing Mail Services
Providing Web Services
Operating System-Level Virtualization
Working with SELinux
Monitoring IT Infrastructure
Index
Customer Reviews