Create an Zero Tier account and setup on OPNsense following: Official Documentation. Also based off this helpful video.
ZeroTier Setup
- Setup DNS on the ZeroTeir network: https://zerotier.atlassian.net/wiki/spaces/SD/pages/900431890/DNS+Management
- Advanced: Create Route on ZeroTier to use the OPNsense IP to access other lan device.
- Add local search doman an local DNS IP. This will allow external nodes to find local resources when connecting remotely.
OPNsense Setup
- Interface Setup
- Create an interface for the zero. Set static IP to the IP given in Zero Tier, make it a /16
- Firewall Rules
- Create rule to allow all incoming taffic on this interface.