I managed to get this working on my AR750 :slight_smile:

It took a bit of fiddling but the instructions from @davidjw were very helpful.

Follow his instructions on the my.zerotier portal configuration.

For the firewall on the AR750 I wasn’t able to get it working by adding it to the lan firewall but here is how I did it.

First create an interface using luci, I used zt0. I mapped it to the phyical interface, custom ( ztqu3bvy4n) this was what zerotier was using by default on my device when I did an ifconfig.

Then on firewall settings I created an new firewall zone Zerotier and added forwarding to and from my LAN and WAN (I may need to forward to all zones but it got it working for now).

That should allow you to access devices on the destination LAN. I think if you want all traffic to traverse that network you would need to add the route 0.0.0.0/0 in the zerotier portal.