Hi guys as title suggests I have a pi 4b 4gb and basically I want to connect it to my isp provided router (wired connection via a lan cable) and run an openvpn config on it and then connect it to an access point that i already have (this one is wired too via a usb to RJ45 adapter and lan cable). I know that I need to flash openwrt image on an sdcard and install it on pi4 but I don’t know how to configure openwrt after that and honestly the guides on the forums and internet are a little confusing (I’m not that tech savy) also I read that not all usb to RJ45 adapters work with openwrt on pi4 but I don’t know which one to buy. can anyone show me a fool proof guide or tell me what I need to do? Edit: thank you all amazing people for your input I found a Google wifi mesh solution second hand (ac-1304 model) that is supported by OpenWRT latest firmware for a good price and I went with that. Gonna find a proper use case for my Raspberry Pi in the future for now gonna keep it as a tinkering device.
You’re not going to have fun when using OpenVPN. Even Wireguard will be a stretch. The Raspberry Pi does not have any hardware cryptography acceleration built-in and the raw compute power is very limited.
EDIT: Maybe you’re going to have acceptable speeds after all? Take a look at the Raspberry results here: https://github.com/cyyself/wg-bench?tab=readme-ov-file#test-results
You could use Tail Scale. It runs great on a Pi
I already have a pi4B just wanted to find a use case for it. Is it really that bad? so how consumer routers with a fifth computing power run vpns?
Ran WireGuard on a Pi1 and it was fine for two users. Albeit WireGuard was the ONLY thing running aside from a Gitlab Runner.
A 4b should be more than enough for many use cases except things that cause torrents of packets - but even then YMMV. It really depends on the workload.
One bit of advice: if you can, use a storage device other than the micro-sd slot for the 4B. Again YMMV.