RE: Raspberry Pi Foundation now recommends 64 bit operating system

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Is there any merit in using a Pi as a firewall on the front end of a small home network?



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If you don't have high speed, sure. I wouldn't recommend it, either way though as the Pi has only one network adapter, and on Pi 3 and earlier it didn't even come close to being able to saturate the card. For example the Pi 3 could only use about 300mbps from the 1000mbps network card. The Pi 4 has improved it a lot but you will still need to run a USB ethernet port to run an additional interface.

You are better with a Protectli device, or repurposing another machine if you can't use a commercial device.

For most, I would just recommend buying something off the shelf. You likely won't be opening ports so it's pretty much default config.

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