{
  "type": "array",
  "items": {
    "type": "object",
    "additionalProperties": false,
    "format": "hostname-rules",
    "properties": {
      "protocol": { "type": "string", "minLength": 1 },
      "host": { "type": "string", "minLength": 1 },
      "port": { "type": ["string", "integer"], "minLength": 1, "format": "valid-port" }
    },
    "required": ["host"]
  }
}