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I would like to implement an OpenVPN server for a small business (~10 people). Since the company owns NAS that are located in their office, the VPN server should ideally be physically in the same location, and not rely on a cloud solution.

If there is no need to transfer large amount of data through the VPN, but only use it to access some day-to-day files (mostly Word Documents, Excel spreadsheets...), could a decent Rapsberry Pi (e.g: model 4B with 8Gb RAM) be a serious candidate for the job ? Are there any resources giving typical requirements for a VPN server depending on the target trafic ?

paupaulaz
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  • Somewhat related: [Does Raspberry Pi 4 processor support AES-NI instructions?](https://raspberrypi.stackexchange.com/questions/106474/does-raspberry-pi-4-processor-support-aes-ni-instructions) – Paul Dec 15 '21 at 17:49

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I'm not a network expert, but I would say potentially yes, although also consider looking at Wireguard as it is noticeably quicker than things like OpenVPN (in my experience with a pi zero-w at home).

From what I recall, the bottlenecks will be network bandwidth on the Pi, and CPU usage. I don't think RAM plays a big part in the way the packets flow through the network stack, but I may be wrong!

Given the cost, it should be easy to test out and then scale/expand.

shearn89
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  • i agree to shaern89, you will run out of cpu, the bandwidth with aldo may be an issue if you dont have a second ethernet card – djdomi Dec 15 '21 at 18:54