Maybe this option isn't yet

badlop — Mon, 27 Mar 2017 15:41:00 +0000

Maybe this option isn't yet available in ejabberd 15.03. In 17.03, the ejabberd guide describes this option:

acl:
  loopback:
    ip:
      - "127.0.0.0/8"
access_rules:
  trusted_network:
    - allow: loopback
modules:
  mod_register:
    ip_access: trusted_network

ejabberd - Comments for "Allowing In-Band Registration from specific IP&#039;s"

Maybe this option isn't yet

ejabberd - Comments for "Allowing In-Band Registration from specific IP's"