OpenVPN dynamic TUN/TAP

Software
1

I thought I would give OpenVPN a try, but I’m not having much luck. It stops with a an error saying “Cannot allocate TUN/TAP dev dynamically”.

Looking at various sites for this message, they all say there should be tun devices under /dev (for Linux, etc). I don’t have any. At least, none that I can find. I’m wondering if something else needs to be installed or if there’s a specific setting that should be used that I can’t figure out?

I’m using 64-bit nighty and Beta 5.

Thanks!

2

I think the tun driver is not yet included in the images.

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3

Ah, that would explain it. I guess it’s not available separately, either. Unless I just can’t find it in Haiku Depot. Thanks!

4

Actually, it is https://cgit.haiku-os.org/haiku/commit/?id=hrev57387
However, it was renamed to tunnel.
It lives in /system/add-ons/kernel/network/devices/tunnel

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5

Hmm. Ok. If I specify that with --dev-node, I get an “operation not allowed” error.

Is it supposed to be able to dynamically create TUN devices? Is there something else that should be specified for it work?

6

Try to follow the manual from this article Haiku Activity & Contract Report, November 2023 (ft. VPN support) | Haiku Project

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7

Awesome! Thanks, that’s what I was searching for. I may be able to get it to work from there.

8

Thanks for linking that! I successfully made it work. :slight_smile:
I always wondered if it was already usable; I think when I read that post originally, the forum software didn’t display the commands in the “Terminal-box”…

Very nice! I hope it’ll soon join the other services in the Network preferences.

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9

Hello, I’m trying to use OpenVPN on Haiku 32bit, I found this thread and included guide but it doesn’t work for me - I do ifconfig tun/0 up then openvpn --config myconf.ovpn but end up with Cannot allocat TUN/TAP dev dynamically, Exiting due to fatal error. I wonder if there’s some missing step?

10

Working from memory, but check your .ovpn file. If it says “dev tun” try changing it to “dev tun/0”

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11

Thanks! That solved it.

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12

My .ovpn files also say “dev tun”, but do work as well…

13

I originally had dev tun_turris there (the OpenVPN server runs on Turris Omnia and it generated the config file for the client) with comment: Use the same setting as you are using on the server.
Maybe changing it to dev tun would be enough but dev tun/0 works, so I’m cool with it :slight_smile:

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