- Ubiquiti's license does not allow redistribution of the software ZIP, so you must manually download the ZIP of the UniFi Controller software from the [Ubiquiti website](https://www.ubnt.com/download/unifi/) and save it to `files/UniFi.unix.zip`. The most recent tested version is "UniFi v5.0.6 Zip for DIY Unix/Linux" from 2016-06-01. If you are including this role via Galaxy, you may download this file to your playbook's `files` directory instead of this role's `files` directory; both will work.
- **unifi_controller_rhel_ntp_server** (optional) sets your preferred NTP server for the UniFi APs to use (default: `pool.ntp.org`)
- **unifi_controller_rhel_unifi_zip_file** (optional) sets the filename of the UniFi controller software on the Ansible system (default: `UniFi.unix.zip`)