With the new Raspbery Pi 4 (RPi4) just released, I decided to make myself a home-use firewall. After stumbling around on the Internet, I found a great article on the subject by Guillaume Kaddouch (https://networkfilter.blogspot.com/2012/08/building-your-piwall-gateway-firewall.html). The article is amazing, and you should read it before going forward–it will make the process described here easier. The thing is, that article was written in 2012 and is based on the ArchLinux distro. Nothing against ArchLinux, but I wanted to make this using the more common Raspbian build. The RPi4 can handle the processing requirements. So, thank you, Guillaume, for the inspiration!! This instructable will be referencing back to Guillaume’s (“GK” for short) original post, you will likely want to have both pages open in your browser.
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.