What is nebula?

Yes, have it running and it works well. Nextcloud setup is sth that I will still have to set up but the only problem I see there is certificates. To debug Nebula, simply try executing it by hand, e.g. nebula --config /path/config.yml and see what the error message is. Or check your journalctl of course. Share the message here and we can have a look!

I got a small network running with Linux, android and Windows, but seldom use it. Windows install worked fine, but it remember it was not well documented (needed to use some argument for it to setup the service). Don't use nextcloud but I do have vaultwarden working over it.

I'm planning to move to headscale due to the certificate management overhead.

@brownmustardminion@lemmy.ml do you mind sharing why nebula and not say WireGuard?

I know this is not the best answer since you would probably like me to talk about Nebula, but I have to say that the best solution I have found for setting up a mesh VPN is Zerotier.

It is a very complete solution. Multisystem, very simple but very configurable, fast, etc.

You simply start by creating a network on the public controller (which will generate an ID for that network) and then join the rest to that network and everyone can communicate with everyone (by default, then you can create subnets if you want).

Using the public controller is completely optional (I personally use it because it is convenient for me and because I have few hosts) but if you want you can set up your own controller, I have an article (the bad thing is that it is in Spanish, but if you run a translator you can understand it perfectly) where I explain how to do it without any requirement. If not, you can use ztncui for it.

Take a look at it, you might find it more attractive than Nebula.

By the way, for me one of the great advantages of ZeroTier is that I don't have to worry about certificates and keys, the controller takes care of everything for you and security is guaranteed from the point of view that each node has a unique identifier.

I've not seen nebula, that looks a lot like tinc. Iight have to see how hard nebula is to get running.

If your looking for a mesh VPN, tinc is very easy to setup

I'm using nebula to remotely access the raspberry pi in my home network and it mostly just works. The dual setup for nextcloud might be a bit more tricky, at least if you want to use HTTPS. You'll probably have to set up a reverse proxy in Nginx for at least one of the routes, since they need different certificates (although since Nebula already authenticates and encrypts your traffic, HTTPS is probably not necessary there).