In order to use our VPN, you need to follow this registration process. You will generate a private key and obtain a personal VPN certificate.
In case, for some reason, you are reinstalling a cube and you want to reuse your VPN certificate, you can find them on a running (or dead) cube as user.crt, user.key, ca-server.crt and credentials in /etc/openvpn/keys.
To configure Yunohost's VPN app, you will need a cube file which contains your VPN credentials and certificates. Put all the VPN files in the same folder.
You will also need a file with the credentials chosen while the registration process :
cd <path/to/foler> nano auth
In the file, write your credentials, for example :
email@example.com Password or Passphrase
In the same folder, download Neutrinet's script to create a .cube :
Run the script :
This is the strict minimum you need:
You can find details about the components and buy them here
You'll also need:
Download the latest version of Yunohost for internet cubes (Olimex Lime1 or Lime2) from https://yunohost.org/en/administrate/install/hardware:internetcube
For instance, for a Lime2 board:
Import the Yunohost GPG key:
gpg --keyserver keyserver.ubuntu.com --recv-keys 1904C5B42E4856DCD4E9CF96360AAF3259A3E6FF
Download the image's signature:
Verify the image's signature:
gpg --verify internetcube-buster-126.96.36.199_v2021.04.01-lime2-stable.img.gz.sig
Uncompress the Yunohost image:
Read the Yunohost documentation for graphical methods: https://yunohost.org/en/administrate/install/hardware:internetcube#flash-the-image-type-image
First, find the device name of your SD card:
Install the image on your SD card (all data on the SD card will be lost).
sudo dd if=internetcube-buster-188.8.131.52_v2021.04.01-lime2-stable.img of=/dev/mmcblk0 status=progress
Ensure that the SD card is not mounted during the copy process!
Remove the SD card from your computer when it's done.
In order to connect to your Cube, you need to find its IP address on your local network.
In your terminal, run:
for interface in $(ip link show up | grep "state UP" | cut -d ':' -f 2); do sudo arp-scan -l --interface "$interface" | grep -P '\t02' | cut -f 1 done
The output should give you a list of IP addresses:
These are IP addresses of Internet Cubes connected on the local network.
If you cannot find your cube, try again a couple of minutes later.
Connect to https://192.168.1.46
192.168.1.46 with the IP address of your Cube found in the previous step)
Provide the following details:
You will be able to change your passwords later on if you want.
Your VPN certificate will be valid for 1 year.
Connect to your Cube with SSH:
(Please replace 192.168.1.46 with the IP address of your Cube found in the previous step)
Install the Neutrinet app for Yunohost in order to let the cube automatically renew the certificate before expiration:
sudo yunohost app install neutrinet
You can keep the default values.
See this page.
If you installed the hotspot Wifi, you need an extra step to configure IPv6.
Connect to https://user.neutrinet.be/ and enter your VPN credentials. You can find them in your cube file or in
/etc/openvpn/keys/credentials on your internet cube.
Go to your client details by clicking on the entry with mail address.
You should see IPv6 subnet lease (the row with a
In case you don't have a IPv6 subnet lease yet, click on
Modify IP lease assignment.
Then click on your mail address and click
Add IPv6 subnet lease.
Choose a range of 64, and click on the
You can then go back to the home page to see your new IPv6 subnet lease.
Connect to Wifi Hotspot admin of your internet cube: https://192.168.1.46/wifiadmin/
Then, under the tab
IPv6, paste the IPv6 subnet lease to the delegated prefix field.
Click on the button
Save and reload to apply your changes.
If you have issues, or maybe you were able to find a fix for an issue, do not hesitate to contact us : https://chat.neutrinet.be
At the very first step of the internet cube installer, the install is stuck with the following error:
E: Repository 'http://deb.debian.org/debian buster InRelease' changed its 'Suite' value from 'stable' to 'oldstable' E: Repository 'http://security.debian.org buster/updates InRelease' changed its 'Suite' value from 'stable' to 'oldstable' E: Repository 'http://deb.debian.org/debian buster-updates InRelease' changed its 'Suite' value from 'stable-updates' to 'oldstable-updates' Command 'DEBIAN_FRONTEND=noninteractive APT_LISTCHANGES_FRONTEND=none LC_ALL=C apt-get -o=Acquire::Retries=3 -o=Dpkg::Use-Pty=0 --quiet --assume-yes update &>> ./data/upgrade.logs' returned non-zero exit status 100.
Connect with SSH to your cube with the root account:
yunohost as password.
Then, just run:
And then answer yes to the questions.
In case there are special characters in your VPN account password:, the install will fail with the following error:
Running: yunohost app addaccess vpnclient -u '******' 'yunohost app addaccess' is deprecated and will be removed in the future 'yunohost app addaccess' is deprecated and will be removed in the future allowed_users: vpnclient: ****** Running: yunohost app setting vpnclient service_enabled -v 1 Running: ynh-vpnclient-loadcubefile.sh -u '******' -p '[REDACTED]' -c /tmp/config.cube [VPN] Error: Configuration updated but service reload failed Command 'ynh-vpnclient-loadcubefile.sh -u '******' -p '[REDACTED]' -c /tmp/config.cube &>> ./data/configure_vpnclient.logs' returned non-zero exit status 1.
Connect to your internet cube with the admin account:
Enter your admin password.
Then, run the command that failed:
sudo ynh-vpnclient-loadcubefile.sh -u "<username>" -p "<password>" -c /tmp/config.cube
<password> with your credentials.)
Make sure to keep the quotes!
On the internet cube installer, retry the last step by clicking on the yellow button.
If the loading bar freeze during the install, set the debug mode button to up.
You will then see the details of the install and what the install procedure is doing.
This is due to a kernel update: you just need to reboot the cube.
Then, connect to the internet cube installer and retry the last step.
By default, the files
/tmp folder are stored in RAM, which isn't a good idea when you have less than 1Gb available in a cube. See tmpfs / armbian
You can disable this by running the following:
sudo sed s/^ENABLED=true/ENABLED=false/ /etc/default/armbian-zram-config -i sudo sed 's/^tmpfs/# tmpfs/' /etc/fstab -i
Then, reboot the cube:
When your cube is connected to the Neutrinet VPN in IPv6, you might be unable to access some websites, although you are able to ping them. In addition, if you have a domain in .nohost.me or .nohost.fr, etc. your cube won't be able to update the DynDNS.
Connect with SSH to the cube:
You need to reduce the MTU used to connect to the VPN:
sudo nano /etc/openvpn/client.conf.tpl
In the section
Custom, add the line:
Then, restart the VPN client:
sudo systemctl stop firstname.lastname@example.org sudo systemctl start ynh-vpnclient-checker
Roundcube require more than 500M to install. On lime 1, it's necessary to add swap. You can do it by running the following :
sudo fallocate -l 1G /swapfile sudo chmod 600 /swapfile sudo mkswap /swapfile sudo swapon /swapfile
You can verify that swap is available :
sudo swapon --show
This should return a line about the swap.
Then edit your fstab file to activate the swap on startup :
sudo nano /etc/fstab
Add the line :
/swapfile none swap sw 0 0