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Help setting up OpenWRT for extra router (feddit.nl)

submitted 4 months ago by [email protected] to c/[email protected]

27 comments fedilink hide all child comments

I have an unused Raspberry Pi 4 (2GB model) lying around and I would like to install OpenWRT on it and use it as a router. I get Internet from DSL so I can't hook it up on the Raspberry Pi directly, I need to plug an Ethernet cable coming from my actual router to the Pi.

I am no expert on networking, so please forgive me if I say something that is wrong. I want the WAN coming in from the router from the Pi's Ethernet port, and the LAN coming out as Wi-Fi. I may also stick an additional Ethernet adapter to it in the future. I have tried doing this many times and have failed. So, could anyone explain to me how could I do this?

Also, what are VLANs, what are their uses and if I wanted one, how could I setup it in OpenWRT?

Thanks in advance.

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[–] [email protected] 3 points 4 months ago (1 children)

OpenWRT should have VLAN support out of the gate. Probably has an admin page for it.

Unless you want to go full wireless I would strongly suggest at least one USB ethernet dongle and a cheap managed switch (managed so you can take advangate of VLANs. Unmanaged switches are cheaper if you decide VLANs aren't for you).

[–] [email protected] 2 points 4 months ago

I agree about the USB Ethernet dongle. Unless you only require short distance wifi range (eg hotel room temp router) the radio in the pi isn't going to be enough

I built a pi4 router a few years ago, and it's still running great, I recommend the project. But unfortunately I can't find the HOWTO and it was before I started taking good notes. I assume your current router is a phone company supplied modem/router?

My setup is cable modem-->pi router-->switch--> old netgear router in Access point only mode

Being that your router/modem is upstream of router, I'm not sure if you could pass-through the WAN to the pi router, and pass back the LAN to the router/modem for the wifi... maybe someone on here can shed some light?