title: Accessing web interfaces not possible
body: <p>I've setup a two node hadoop instance on google compute engine. I got an dynamic external ip address which is <code>108.59.84.14</code>. I also did setup a proper hadoop configuration so the standard hadoop yarn ports are used which are for instance 8088 (the web interface for the Resource­Manager Web UI).</p>
  
  <p>For granting external access I ran the following command (contains standard ports for hadoop stuff):</p>
  
  <pre><code>gcutil addfirewall web --network=hadoop-access --allowed=tcp:8088,tcp:50060,tcp:50070,tcp:50075,tcp:50090,tcp:20000,tcp:20001 --project=&lt;project&gt;
  </code></pre>
  
  <p>Now, after having started hadoop and after having checked that everything works fine:</p>
  
  <pre><code>hadoop@namenode:~$ jps
  8057 NameNode
  8451 ResourceManager
  8164 DataNode
  8544 NodeManager
  8306 SecondaryNameNode
  8835 Jps
  </code></pre>
  
  <p>I'd like to access the web interface. To do so I open up chrome browsr and enter <code>108.59.84.14:port</code> where port is for instance 8088. However, none of the ports work. I always get an error message which states that this page does not exist.</p>
  
  <p>What am I doing wrong?</p>