{
  # DHCPv4 permit authenticated client config
  # empty configs are not accepted by Kea
  /// This configuration declares some subnets but has no interfaces-config
  /// Reference Kea #245
  "Dhcp4": {
    "valid-lifetime": 1800,
    "subnet4": [
      # subnet declaration
      {
        "id": 1,
        "subnet": "10.5.5.0/27",
        "pools": [
          # pool declaration
          {
            # avoid empty pool
            "pool": "10.5.5.5 - 10.5.5.10",
            /// From:
            ///   allow authenticated clients
            /// [un]authenticated-clients is not supported by ISC DHCP and Kea
            "client-class": "gen#!ALL#"
          }
        ]
      }
    ],
    "client-classes": [
      {
        "name": "gen#!ALL#",
        "test": "not member('ALL')"
      }
    ]
  }
}