I am thinking of setting up an overlay network using Nebula but I am curious as to what other completely open source projects there are out there. Sure I know about the commercial ones like Tailscale and Zerotier but I’d like to know what else I might be missing.
Sorry, I commented then went to Europe for 3 weeks; Browsing detox.
Symmetric NAT wouldn’t be an issue for Nebula at all – or WireGuard, as you know, but neither ZeroTier.
If you’re worried about CGNAT, it has several ways to deal with it:
https://nebula.defined.net/docs/config/punchy/
The lighthouse can also act as a bastion/proxy and handle the connections for you, if your two nodes can’t speak directly.
That being said… if you’re supporting other users, I think wireguard is the way to go.