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https://github.com/jamesog/tailscale-edgeos

Running Tailscale on Ubiquiti EdgeOS
https://github.com/jamesog/tailscale-edgeos

edgeos edgerouter tailscale ubiquiti ubnt

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Running Tailscale on Ubiquiti EdgeOS

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# Tailscale on EdgeOS



This is a short guide for getting [Tailscale](https://tailscale.com/) running on the Ubiquiti EdgeRouter platform. EdgeOS 2.0+ is required to make use of the systemd unit file shipped by Tailscale.



This was originally inspired by [lg](https://github.com/lg)'s [gist](https://gist.github.com/lg/6f80593bd55ca9c9cf886da169a972c3) and [joeshaw](https://github.com/joeshaw)'s [suggestion](https://gist.github.com/lg/6f80593bd55ca9c9cf886da169a972c3#gistcomment-3578594) of putting everything under `/config/tailscale` rather than directly in `/config`, however this guide uses Tailscale's Debian package repository instead of downloading the tarball and manually managing the files.



## Installing Tailscale



1. Configure the Tailscale apt repository



    ```

    configure

    set system package repository tailscale url '[signed-by=/usr/share/keyrings/tailscale-stretch-stable.gpg] https://pkgs.tailscale.com/stable/debian'

    set system package repository tailscale distribution stretch

    set system package repository tailscale components main

    commit comment "Add Tailscale repository"

    save; exit

    ```



2. Create required directories and download and run firstboot script



    Scripts in the `firstboot.d` directory are run after firmware upgrades.

    This script ensures that the Tailscale daemon's state is symlinked to

    `/config` so it persists across firmware upgrades (otherwise you'll have to

    set up as a new device on every upgrade) and installs a `post-config.d`

    script to ensure Tailscale is installed after each boot.



    The `post-config.d` script also copies the Debian package to

    `/config/data/firstboot/install-packages` so the package can be installed

    during `firstboot` after a firmware upgrade to ensure the package gets

    installed and doesn't require downloading it again. This also means the

    same version will be consistently installed.



    ```sh

    sudo bash

    mkdir -p /config/scripts/firstboot.d

    curl -o /config/scripts/firstboot.d/tailscale.sh https://raw.githubusercontent.com/jamesog/tailscale-edgeos/main/firstboot.d/tailscale.sh

    chmod 755 /config/scripts/firstboot.d/tailscale.sh

    /config/scripts/firstboot.d/tailscale.sh

    /config/scripts/post-config.d/tailscale.sh

    ```



3. Log in to Tailscale



    The example below enables subnet routing for one subnet, enables use as an exit node (Tailscale 1.6+), and uses a one-off pre-auth key, which can be generated at https://login.tailscale.com/admin/authkeys



    :warning: Remember to change `192.0.2.0/24` with the subnet(s) you *actually want to expose* to the tailnet.



    ```sh

    tailscale up --advertise-routes 192.0.2.0/24 --advertise-exit-node --authkey tskey-XXX

    ```



4. (Optional) If you want `sshd` to explicitly listen on the Tailscale address instead of all addresses:



    1. Fetch the override unit



        ```sh

        curl -o /config/tailscale/systemd/tailscaled.service.d/before-ssh.conf https://raw.githubusercontent.com/jamesog/tailscale-edgeos/main/systemd/tailscaled.service.d/before-ssh.conf

        systemctl daemon-reload

        ```



    2. Exit the shell, enter configure mode and set the listen-address



        If you don't currently have any listen-address directives, make sure you add any other addresses you want to access the router by, such as a private network IP.



        The Tailscale IP can be found in the admin console, or using `tailscale ip`.



        ```

        exit

        configure

        set service ssh listen-address 

        commit comment "sshd listen on Tailscale IP"

        ```



## Firmware Upgrades



After an EdgeOS upgrade third-party packages are no longer installed, but the

`firstboot` script described above ensures Tailscale gets reinstalled.



Note that it will install the Tailscale version from the first time the

`post-config.d` script ran. If you had upgraded Tailscale since you will need

to re-upgrade it.



## Upgrading Tailscale



Upgrading is straightforward as the package manager will do everything for you.



**Note:** DO NOT USE `apt-get upgrade`. This is not supported on EdgeOS and may

result in a broken system.



```

sudo apt-get update

sudo apt-get install tailscale

```



If you want to install a specific version of Tailscale use:



```

sudo apt-get install tailscale=X.Y.Z

```



Where `X.Y.Z` is the version you want. This also works for downgrading.



If you consider this version to be "stable" for your use-cases you should think

about copying the package to flash memory so it survives firmware upgrades,

otherwise an older version may get installed.



First check if old packages are saved:



```

sudo bash

ls -l /config/data/firstboot/install-packages

```



If old versions exist delete them, e.g.



```

rm /config/data/firstboot/install-packages/tailscale_1.6.0_mips.deb

```



Then copy the latest version:



```

cp /var/cache/apt/archives/tailscale_*.deb /config/data/firstboot/install-packages

```



If you still receive an **out of space** error when upgrading, try cleaning the system's images using:



```

delete system image

```



If you have a **certificate error** when upgrading, unfortunately it is an [EdgeOS problem](https://community.ui.com/questions/Fix-Solution-Lets-Encrypt-DST-Root-CA-X3-Expiration-Problems-with-IDS-IPS-Signature-Updates-HTTPS-E/0404a626-1a77-4d6c-9b4c-17ea3dea641d), but to correct it manually you can run the following commands:



```

sudo -i

sed -i 's|^mozilla\/DST_Root_CA_X3\.crt|!mozilla/DST_Root_CA_X3.crt|' /etc/ca-certificates.conf

curl -sk https://letsencrypt.org/certs/isrgrootx1.pem -o /usr/local/share/ca-certificates/ISRG_Root_X1.crt

update-ca-certificates --fresh

```



## Uninstalling



```

sudo apt-get purge tailscale

sudo rm /config/scripts/firstboot.d/tailscale.sh /config/scripts/post-config.d/tailscale.sh

configure

delete system package repository tailscale

commit comment "Remove Tailscale repository"

save; exit

```