[kajiryoji]

I have found tailscale to be far more superior. For one, it actually works behind double NAT whereas zerotier just doesn’t

[raarts]

Not true. I used it behind double NAT without problems in the past. Even in 2014.

[api]

Success in traversing double NAT with anything depends a lot on the NATs. If one of them is symmetric, you're pretty much SOL.