August 2021
Intermediate to advanced
542 pages
11h 16m
English
Content preview from Linux Cookbook, 2nd Edition
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Chapter 18. Building an Internet Firewall/Router on Raspberry Pi
The Raspberry Pi (RPi) makes a great internet firewall/router for small networks, and it does not cost a lot of money. You can use any Raspberry Pi, but I recommend the Raspberry Pi 4B because it is more powerful than the older Pis and is the first Pi with a dedicated gigabit Ethernet port.
Overview
In this chapter you will learn how to install Raspberry Pi OS, connect your Pi to a computer monitor or TV, use the Raspberry Pi OS recovery mode, run your Pi headless, add a second Ethernet port, share an internet connection, and use the Pi for LAN name services.
Note
The examples in this chapter are all on a Raspberry Pi 4 Model B, using the Raspberry Pi OS. Raspberry Pi OS used to be called Raspbian. Underneath it is Debian Linux, so if you are accustomed to Debian, Ubuntu, Mint, or any other Debian variant, it’s the same Linux.
Pros and Cons of a Raspberry Pi Firewall/Router
The Raspberry Pi is a general-purpose computer, not a specialized firewall/router. It has WiFi, Ethernet, and Bluetooth, and it runs Linux. In comparison, a common choice for small networks is the small combination firewall/router/wireless access point/ Ethernet switch, like the Linksys AC1900 or the TP-Link Archer AX20. These have WiFi, gigabit Ethernet, multiple antennas, and support for “smart” services like Alexa and smartphone administration apps.
The drawback to these devices is their inflexibility, especially limited storage and operating ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.