Book Image

CentOS 7 Linux Server Cookbook - Second Edition

By : Jonathan Hobson
Book Image

CentOS 7 Linux Server Cookbook - Second Edition

By: Jonathan Hobson

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.
Table of Contents (22 chapters)
CentOS 7 Linux Server Cookbook Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Creating an integrated nameserver solution


So far in this chapter, we used Unbound as a caching-only DNS server solution because it is very secure and fast, and BIND as our authoritative-only DNS server because its zone management is highly configurable and customizable. BIND has been around for a long time and is the most used DNS software ever. However, a number of critical bugs have been found (and luckily fixed) in the past. Here in this recipe, we will combine Unbound with BIND to get the best of both worlds: Only the very secure Unbound service will be directly exposed to your private network and can take and serve DNS queries from your clients. The BIND service stays bound to localhost only as it was configured in a former recipe and is only allowed to resolve internal hostnames and does not have direct access to the Internet or your clients. If a client connects to your Unbound service and requests to resolve an internal hostname from your private network, Unbound will query the...