Linux Networking Solutions - Part 1
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Linux Networking Solutions - Part 1

Learn to successfully set up, build, and manage your computer networks using Linux
0.0 (0 ratings)
Instead of using a simple lifetime average, Udemy calculates a course's star rating by considering a number of different factors such as the number of ratings, the age of ratings, and the likelihood of fraudulent ratings.
9 students enrolled
Created by Packt Publishing
Last updated 5/2017
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  • 2 hours on-demand video
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
What Will I Learn?
  • Setting up a physical network
  • Configuring IPv4
  • Setting up DHCP
  • Setting up your system to talk to a nameserver
  • Configuring dynamic DNS on your local network
  • Setting up an IPv6 tunnel via Hurricane Electric
  • Installing OpenSSH
  • Using OpenVPN
  • Configuring Apache with TLS
View Curriculum
  • You should be familiar with how to set up Linux servers and how to install additional software on them.

We will first explore configuring a router. Initially, you will manually configure IP address information on your system and then properly configure the system to bring up its interfaces automatically. From there, we'll move on to extend your system to act as a router for your own network, including DHCP for dynamically configuring client systems.

After that you will configure DNS. You will set up your internal DNS server to resolve external hostnames, and host DNS records for your own domain.

Next you will configure IPv6. Starting with a brief introduction to IPv6, you'll configure a tunnel to provide IPv6 connectivity, implement firewalling using iptables6, and provide IPv6 addresses to the rest of your network.

Next you will look at remote access and explore methods for remotely interacting with your new network using OpenSSH and OpenVPN.

Finally you will explore Web Servers; here you will set up web servers hosting PHP code, using both the Apache HTTPD server and NGINX.

About the Author

Gregory Boyce is a technologist with nearly 20 years' experience using and managing Linux systems. When he's not at work or spending time with his wife and two daughters, he plays around with new technologies. Gregory has spent the last 15 years working at Akamai Technologies, where he has worked in roles ranging from Network Operations, Internal IT, Information Security, Software Testing, and Professional Services. Currently, he heads up the Linux OS team that manages Akamai's custom Linux operating system, which runs on their massively distributed customer-facing network.

Who is the target audience?
  • This video is targeted at Linux systems administrators who have a good basic understanding and some prior experience of how a Linux machine operates, but want to better understand how various network services function, how to set them up, and how to secure them.
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Curriculum For This Course
29 Lectures
Configuring a Router
10 Lectures 39:00

This video provides an overview of the entire course.

Preview 04:40

In this video, we will configure the network within Linux.

Setting Up the Physical Network

In this video, we will configure IPV4 in both the servers.

Configuring IPv4

In this video, we will configure IPv4 permanently in Ubuntu as well as in centOS.

Configuring IPv4 Permanently

We will see how to connect two networks, here we will configure 3 servers and interchange the data.

Connecting Two Networks

Connecting two local networks is useful, but these days it's more common to want to connect a local network to the Internet.

Enabling NAT to the Outside

You now have a router that provides Internet access to all systems behind it, but the systems behind it need to be manually configured with IP addresses while avoiding conflicts.

Setting Up DHCP

In this section, we're going to go a bit deeper into configuring a secure firewall for your network.

Setting Up a Firewall with iptables

Sometimes, you want to forward a port to a system behind the firewall instead of having the service run on the firewall itself.

Setting Up Port Forwarding

What if we want to have multiple private networks behind the route?

Adding VLAN Tagging
Configuring DNS
5 Lectures 22:24

We cannot visit web pages by requesting them by IP address; rather we will ping them by their domain name. This problem is solved using a recursive DNS server to resolve the hostnames into IP addresses.

Preview 04:23

Set up your own recursive nameserver, which will help cut down on the round trips between you and your resolver.

Setting Up a Local Recursive Resolver

 With the use of Dynamic DNS, you can leverage your DNS server to address your local systems by name.

Configuring Dynamic DNS on Your Local Network

It works the same way as setting up a DNS server for an internal hostname, just with a few additional parts that we'll want to make sure are in a good state.

Setting Up a nameserver for Your Public Domain

Bind/named can handle the synchronization internally, through the use of zone transfer (AXFR) requests or incremental zone transfer (IXFR) requests secured with the same type of HMAC keys utilized by the DHCP server to send updates to the DNS server.

Setting Up a Slave nameserver
Configuring IPv6
3 Lectures 11:05

In addition to their hosting/transit services, they also host, another free IPv6 tunnel provider, and, a training and certificate site for learning about IPv6 networking. 

Preview 04:58

This tool is the IPv6 version of the iptables command we've already used, and it operates in almost the same manner.

Using ip6tables to Firewall Your IPv6 Traffic

IPv6 has ability to obtain a large number of public IP addresses for your local networks rather than using NAT.

Route an IPv6 netblock to Your Local Network
Remote Access
5 Lectures 21:25

All Linux distributions offer the ability to install a Secure Shell (SSH) server.

Preview 06:54

 If you are connecting from another Unix system, such as Linux or Mac OS X, you can launch a terminal and use the SSH command-line tool from OpenSSH.

Using OpenSSH as a Basic Shell Client

In this section we will see ability of Openssh to forward ports from the remote system to your local system or vice versa

Using OpenSSH to Forward Defined Ports

If you're looking to access webpages through an SSH proxy, you may find that the —L option is a bit too limiting, since you need to specify each individual web server that you're forwarding and give each one its own local port.

Using OpenSSH as a SOCKS Proxy

OpenVPN is a full SSL VPN solution that allows you to connect two networks at layer 2 or 3 via a TCP or UDP tunnel.

Using OpenVPN
Web Servers
6 Lectures 24:11

Installing Apache with TLS is easier than ever, although the specific process can vary from distribution to distribution due to differences in configuration layout.

Preview 05:10

Apache2 offers a variety of Multi-Processing Modules (MPM) for defining how the daemon will handle scaling.

Improving Scaling with the Worker MPM

PHP is a very common programming language to use on Apache webserver, largely due to its ease of use.

Setting Up PHP Using an Apache Module

PHP code can certainly be secure, it often appeals to new developers who have not yet learned secure coding practices.

Securing Your Web Applications Using mod_security

NGINX works well as a lightweight, fast, multithreaded offering.

Configuring NGINX with TLS

Using this approach can limit what content runs through the processor.

Setting Up PHP in NGINX with FastCGI
About the Instructor
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