Tailscale installer (in OPNSense)

Installing Tailscale

Open https://tailscale.com/download/linux
Copy the command in your clipboard
Go to your Docker CT Console
Run the command from your clipboard

Connection error

If an error occurs that tailscale cannot be started, you must first perform the following steps.
However, these are also officially linked by tailscale.

Tailscale in LXC containers

Nevertheless, I will explain the steps to you now

Go to your proxmox Console
run nano /etc/pve/lxc/101.conf (the number changes depending on which CT-Id you use)
add at the end:

lxc.cgroup2.devices.allow: c 10:200 rwm
lxc.mount.entry: /dev/net/tun dev/net/tun none bind,create=file

Safe (STRG+o) and close (STRG+x) the file
Reboot the CT

Connect Tailscale

When the installation is complete, you only need to execute the following command. Now select how you want to connect Tailscale to your Docker-CT.
There are four different options.

tailscale up > Execute this command to establish the simple connection.
tailscale up --ssh > This will allow you to establish an SSH connection via tailscale (my choice)
tailscale up --advertise-exit-node > Run this command to use OPNsense as VPN or Exit Node
tailscale up --ssh --advertise-exit-node > Establish tailscale with SSH connection and exit node

After you have entered your name, a link like “https://login.tailscale.com/a/RANDOMNUMBER” will appear.

Enter this into the browser to log in to Tailscale.
Your OPNsense will now automatically be added to your tailscale, as soon as you have confirmed everything you will automatically be taken to your machines.

Congratulations, you can now connect to your Docker CT with FTP via your Tailscale address