title: Can't connect to mLab database
body: <p>I'm trying to connect to my mongodb database from URI that is hosted on mLab, but I couldn't, this error is displayed:</p>
  
  <pre><code>Connection failed.
  
  SERVER [ds121090-a0.mlab.com:19490] (Type: UNKNOWN) 
  __/ Connection error (MongoSocketOpenException): Exception opening socket
  |____/ I/O error: connect timed out
  
  Details:
  Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=ds132132190-a0.mlab.com:19490, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.SocketTimeoutException: connect timed out}}]
  mongodb://user:xxxxx@ds132132190.mlab.com:19490/mydb
  </code></pre>
  
  <p>My localhost db works fine. </p>
  
  <p>What's wrong with my server db?</p>