This is the netconf service, which can be built and run by placing it in the services.d subfolder of the ZeroTier One home directory. Users probably won't be interested in this. It's for running a "netconf master," which handles certificate issuing, static IP assignment, and other things for a network. The ZeroTier address of the netconf master forms the first 40 bits of a hexadecimal network ID, permitting the master to be located and queried. Masters currently don't support multi-homing, but they can easily be made fault tolerant via fail-over. If the master node goes down, it can be started elsewhere with the same ZT1 identity. (The underlying database would also have to be fault tolerant.) For this to work it requires a MySQL backend with a properly structured database.