6. Providing Security
by Jonathan Hobson, Oliver Pelz
CentOS 7 Linux Server Cookbook - Second Edition
- CentOS 7 Linux Server Cookbook Second Edition
- Table of Contents
- CentOS 7 Linux Server Cookbook Second Edition
- Credits
- About the Authors
- About the Reviewer
- www.PacktPub.com
- Preface
- 1. Installing CentOS
- Introduction
- Downloading CentOS and confirming the checksum on Windows or OS X
- Creating USB installation media on Windows or OS X
- Performing an installation of CentOS using the graphical installer
- Running a netinstall over HTTP
- Installing CentOS 7 using a kickstart file
- Getting started and customising the boot loader
- Troubleshooting the system in rescue mode
- Updating the installation and enhancing the minimal install with additional administration and development tools
- 2. Configuring the System
- Introduction
- Navigating text files with less
- Introduction to Vim
- Speaking the right language
- Synchronizing the system clock with NTP and the chrony suite
- Setting your hostname and resolving the network
- Building a static network connection
- Becoming a superuser
- Customizing your system banners and messages
- Priming the kernel
- 3. Managing the System
- Introduction
- Knowing and managing your background services
- Troubleshooting background services
- Tracking system resources with journald
- Configuring journald to make it persistent
- Managing users and their groups
- Scheduling tasks with cron
- Synchronizing files and doing more with rsync
- Maintaining backups and taking snapshots
- Monitoring important server infrastructure
- Taking control with GIT and Subversion
- 4. Managing Packages with YUM
- 5. Administering the Filesystem
- 6. Providing Security
- 7. Building a Network
- 8. Working with FTP
- 9. Working with Domains
- 10. Working with Databases
- 11. Providing Mail Services
- 12. Providing Web Services
- 13. Operating System-Level Virtualization
- 14. Working with SELinux
- 15. Monitoring IT Infrastructure
- Index
In this chapter, we will cover the following topics:
- Locking down remote access and hardening SSH
- Installing and configuring fail2ban
- Working with a firewall
- Forging the firewall rules by example
- Generating self-signed certificates
- Using secure alternatives to FTP
This chapter is a collection of recipes that provides a solid framework on which a server can be made secure in almost any environment. Security is the cornerstone of a good administrator, and this chapter illustrates how quickly and easily you can design and implement a series of checkpoints that will deliver the protection you need.
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