I built the Zerotier plugin for pfSense and got it to work for simple ping and remote management but my limited skills in route management and bridging a ZT 10.10.0.0/24 into my local 192.168.0.0/20 lan resulted in crashing both ends and full re-install of pfsense to re-gain access to the gui… (yes I tried all the recovery console options, and thank god for configuration backups!) Fyi as far as i can tell the unofficial zerotier plugin DOES BREAK RECOVERY!!! Just a heads up to anyone else who tries this make backups and have OS disk handy…