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Restricted Tailscale docker instance (lemmy.world)

submitted 1 week ago* (last edited 1 week ago) by TheFrogThatFlies@lemmy.world to c/selfhosted@lemmy.world

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My ISP uses CG NAT which is stopping me from reaching my internal network, so I'm thinking about using Tailscale to allow me to connect to my server and hence to my internal network.

But I'm not very comfortable giving 100% access to Tailscale to my internal network, so I was thinking if I could limit it only to what it requires to connect to the internet and to a wireguard service running in the same container. This would in turn connect to a wireguard server in the container's host and provide me with full network access.

I know, as long as they have a service running in the server, even if inside a container, they can always be able to access the host. But even do I would feel safer if at least tried to contain it.

Does anyone know if this is possible? And can it be done through Docker Compose?

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[–] codemichael@lemmy.world 6 points 1 week ago

Yes, you can run Tailscale in a container. You could create a second VLAN, attach it to your hosts interface, add a macvlan docker interface to the container and put it directly on your network.

If you have concerns about the software running on your host I would recommend getting a dedicated piece of hardware instead (rpi, zimaboard, etc).

How paranoid are you wanting to be? You can either go Headscale, or Tailnet Lock (my preference) to give your self some peace of mind. It completely depends on your threat model, which you didn't mention.