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Okay, so two really big things:
You're confused a bit on how network routing works. If you're building something that bridges multiple networks (local + VPN + VPS), you need to know about how to route things to different places. You're dealing with 3 networks at this point.
You might be misunderstanding how "zero-trust" and local networking fit together. Right now you have some local machines at least, AND a router. You don't need all of your local machines to individually bridge a gap to your VPS, you want it the other way around.
If the majority of your machines are local, then make that your hub. Everything else should be a client. Adding all these individual nodes to routes in a mesh network makes absolutely no sense, and will definitely cause routing problems, if not something like ARP poisoning (we can't see your config).
Just make the remote machine clients to your local network and be done with it.
Thanks for your response! I'm completely self-taught, so I'll go ahead and acknowledge knowledge gaps on my end, but how would putting all the nodes in a network cause routing problems or ARP poisoning?
I recognize that what I'm trying to accomplish is a bit overkill for the average home network, and a lot of my reasoning behind my design is purely for learning. My reasoning for putting everything on a mesh network is 2-fold:
I have successfully run this setup previously with the NetBird management console hosted in a VPS, however the issue I ran into was that if internet went down at home, I could no longer access my locally hosted services through the mesh network. I could still access them via IP, since I was on the same LAN, but that defeats my goal of centralized control, mDNS, and a central source of truth that I got via the mesh network.
I have also successfully ran this setup completely local, however I am unable to access it from outside my homelab. For my use case, I think having all components of the mesh network hosted within my homelab is the best design. However now I have to figure out the best way to allow external connections to my management interface. Thus my original question should I use a cloudflare tunnel to my management interface, set up a wireguard tunnel from an externally accessible VPS service pointed to my management interface, or something different?
It's not about actually getting it to work, it's about having it work PROPERLY.
You have multiple routes to the same network right now it sounds like, and you're almost certainly routing local network traffic over NetBird instead of using local routes. Have you looked at your routing tables?
That's one of the advantages for those interested in ZTN. In a somewhat similar way to IPv6, a local address/network isn't inherently trustworthy.
That's precisely the functionality I want, though. Secure, encrypted, mutually identified traffic should be the only traffic in a zero trust network.
I'm simply trying to create an ingress point into this network for outside access.