Orbital Sync synchronizes multiple Pi-hole instances for high availability (HA) using the built-in "teleporter". In other words, it performs a "backup" in the Pi-hole admin interface of your primary Pi-hole instance, and then "restores" that backup to any number of "secondary" Pi-holes also via their admin interface. As a result, it supports the synchronization of anything currently supported by Pi-hole's "teleporter". If you have more than one slave instance you can add extra variables for SECONDARY_HOST_2_BASE_URL: SECONDARY_HOST_2_PASSWORD: SECONDARY_HOST_3_BASE_URL: SECONDARY_HOST_3_PASSWORD: If one or all of your pihole instances use a custom path which isn't '/admin' (ie. you are running them behind a reverse proxy) you can specify a custom path with SECONDARY_HOST_X_PATH variable, where X is the slave numer or PRIMARY_HOST_PATH for the primary. There is no web UI for this app, check the logs to see if it has run successfully.