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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

11 comments fedilink hide all child comments

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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[–] droolio@feddit.uk 5 points 1 week ago

There's no point doing anything fancy like that - wireguard over Tailscale is pretty pointless, as Tailscale is literally wireguard with NAT traversal and authentication bolted on. Unless you enable subnetting, it can't get more secure than that.

And even if you do enable subnetting (which you might wanna do if you need access to absolutely everything), you can use Tailscale ACLs to keep tighter control - say, from specific (tagged) devices.