Mastering Linux Network Administration电子书

Mastering Linux Network Administration

Table of Contents

Mastering Linux Network Administration

Credits

About the Author

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Setting up Your Environment

Getting started

Distributions to consider

Physical machines versus virtual machines

Setting up and configuring VirtualBox

Acquiring VirtualBox

Downloading and installing the Extension Pack

Acquiring and installing Debian 8

Acquiring and installing CentOS 7

Summary

2. Revisiting Linux Network Basics

Understanding the TCP/IP protocol suite

Naming the network device

Understanding Linux hostname resolution

Understanding the net-tools and iproute2 suites

Manually managing network interfaces

Managing connections with Network Manager

Summary

3. Communicating Between Nodes via SSH

Using OpenSSH

Installing and configuring OpenSSH

Connecting to network hosts via openssh-client

The OpenSSH config file

Understanding and utilizing scp

Transferring files to another node via scp

Tunneling traffic via SSH

Generating public keys

Keeping SSH connections alive

Exploring an alternative to SSH – utilizing Mosh (mobile shell)

Summary

4. Setting up a File Server

File server considerations

NFS v3 versus NFS v4

Setting up an NFS server

Learning the basics of Samba

Setting up a Samba server

Mounting network shares

Automatically mounting network shares via fstab and systemd

Creating networked filesystems with SSHFS

Summary

5. Monitoring System Resources

Inspecting and managing processes

Understanding load average

Checking available memory

Using shell-based resource monitors

Scanning used storage

Introduction to logging

Maintaining log size with logrotate

Understanding the systemd init system

Understanding the systemd journal

Summary

6. Configuring Network Services

Planning your IP address layout

Installing and configuring a DHCP server

Installing and configuring a DNS server

Setting up an internal NTP server

Summary

7. Hosting HTTP Content via Apache

Installing Apache

Configuring Apache

Adding modules

Setting up virtual hosts

Summary

8. Understanding Advanced Networking Concepts

Dividing your network into subnets

Understanding the CIDR notation

Implementing Quality of Service

Routing TCP/IP traffic

Creating redundant DHCP and DNS servers

Summary

9. Securing Your Network

Limiting the attack surface

Securing OpenSSH

Configuring the iptables firewall

Protecting system services with fail2ban

Understanding SELinux

Configuring Apache to utilize SSL

Deploying security updates

Summary

10. Troubleshooting Network Issues

Tracing routing issues

Troubleshooting DHCP issues

Troubleshooting DNS issues

Displaying connection statistics with netstat

Scanning your network with Nmap and Zenmap

Installing missing firmware on Debian systems

Troubleshooting issues with Network Manager

Summary

Index