I have several devices behind various complicated NATs. Sometimes even outbound traffic is filtered other than for 80/tcp and 443/tcp.
What I can do is to install Tailscale on aVPS and open ports that Tailscale wants, eg, 41641/udp . With this investment, will I definitely get quick peer to peer connections between all devices? That VPS is supposed to make it possible, but I am not sure.
I don’t want slow relaying to Singapore or whatever (my current situation when I use Tailscale).