This 1st `stage <https://github.com/iiab/iiab/wiki/IIAB-Contributors-Guide#ansible>`_ (1-prep) arranges low-level things like remote support infra, DNS prep, hardware, low-level OS quirks, and basic security:
Recap: Similar to 0-init, 2-common, 3-base-server, 4 server-options and 5-xo-services — this 1st stage installs core server infra (that is not user-facing).