title: MongoDB: Server has startup warnings ''Access control is not enabled for the database''
body: <p>I firstly installed MongoDB 3.4.1 today. But when I start it and use MongoDB shell, it gave me these warnings below:    </p>
  
  <pre><code>C:\Users\hs&gt;"C:\Program Files\MongoDB\Server\3.4\bin\mongo.exe
  MongoDB shell version v3.4.1
  connecting to: mongodb://127.0.0.1:27017
  MongoDB server version: 3.4.1
  Server has startup warnings:
  2017-01-12T21:19:46.941+0800 I CONTROL  [initandlisten]
  2017-01-12T21:19:46.942+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
  2017-01-12T21:19:46.942+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
  2017-01-12T21:19:46.942+0800 I CONTROL  [initandlisten]
  </code></pre>
  
  <p>my computer is Microsoft Windows [<code>version 10.0.14393</code>].</p>