I don't think you need to pay $6 a month to try it out.
Install it on all the machines you want. When you are running it on the machine, it is networked to the other machines that are running it. Now make an 'exit node' on one of those machines by selecting it in the UI, and all your gear can access the internet via that exit node. Your phone can run it. Your apple tv can run it. You can have multiple exit nodes. So you can have a worldwide network and not once did you have to open ports in firewalls etc.
So, somewhere on that website, there’s a free version that can be downloaded onto a desktop and run without signing up for their service?
I think I understand what it does now. So, basically you leave a computer running at home, and this thing lets you pretend to be running your internet stuff through it while you’re on the road?
How does it compare to Zerotier? The way I understand it it's kind of overlapping functionality but not necessarily everything. What I want from Zerotier is basically what you described about Tailscale.
The two problems I have with zerotier are:
1) It's supposed to let a mobile device like an Android tablet route its traffic through zerotier (functioning as a VPN to my home site, in this case). However, I've never got that to work. It's running, but doesn't affect anything network-wise for the other applications (unlike running e.g. openvpn on it)
2) On a couple of computers with specific routing set up to various destinations, when Zerotier runs it simply blocks all of that and there's no way for me to continue accessing anything else than the Zerotier network. No fiddling with routing tables etc. changes any of that. On other computers, also some running OpenVPN, Zerotier does not interfere. I've never figured out what causes this.
So, in short, I'm pondering if I should ditch Zerotier and try Tailscale instead. If it does the same - I simply want a way to connect my devices, but I also don't want to lose total control over routing. For mobile devices I would want full VPN, for computers I don't. Edit: So, I'm both after connecting my multiple networks, as well as VPN'ing certain things or devices through another location.
Thanks for any input on this.