I’ll use a software called “iptables” for this, but you can use any other firewall software if you prefer. It allows us to add security policies in the router.įor instance, in the previous example, we can configure that A can ping B, but not access the HTTP server on B. So, the router part in this tutorial will allow us to connect the Wi-Fi network to the Ethernet network. The Raspberry Pi have only one Ethernet card, but we can use the Wi-Fi card to create a second network. If the router is well configured, it allows A and B to see each other, while on a different network. In this schema, we have two different networks, connected with a router: 1.0 and 2.0. If you have two Ethernet ports on a computer, with different networks on each, your computer can act as a router. If you are lost in all these new words and abbreviations, request my free Raspberry Pi glossary here (PDF format)!Ī router is a network device that connects two networks together. The first third of the book teaches you the basics, but the following chapters include projects you can try on your own. It’s a 30-day challenge, where you learn one new thing every day until you become a Raspberry Pi expert. If you are looking to quickly progress on Raspberry Pi, you can check out my e-book here.
#UNTANGLE FIREWALL RULES EXAMPLE HOW TO#
I’ll start with the theory and then explain how to install each software. It’s a big topic with many services and network notions to understand. One way to build a firewall is to use the hostapd and iptables services.Īnd I’ll show you how. The Raspberry Pi only have one Ethernet socket, so it’s not possible to create a firewall with two RJ45 interfaces.īut there is a Wi-Fi interface that can be used for one side (LAN for example). But now it’s ok, I finally found how to do it, and I’ll share this with you
I first tested Pfsense and OpenWRT with no success, and on a fresh Raspberry Pi OS I was missing information. I wanted to build a router firewall on Raspberry Pi for a long time.