I've installed unbound from the stable repos on debian jessie 8.8, unbound version 1.4.22. Installed via: "apt-get install unbound python-unbound". I'm not able to get the python module to load. If I add "module-config: "validator python iterator" to the config file, it fails the unbound-checkconf & thus fails to restart:  unbound-checkconf[28142:0] fatal error: module conf 'validator python iterator' is not known to work I feel like I'm missing a simple step here but I can't figure out what it is. The man page says the above config should work.