title: fs.defaultFS only listens to localhost's port 8020
body: <p>I have a CDH4.3 all-in-one vm up and running, i am trying to install a hadoop client remotely. I noticed that, without changing any default settings, my hadoop cluster is listening to <code>127.0.0.1:8020</code>.</p>
  
  <pre><code>[cloudera@localhost ~]$ netstat -lent | grep 8020
  tcp        0      0 127.0.0.1:8020              0.0.0.0:*                   LISTEN      492        100202 
  
  [cloudera@localhost ~]$ telnet ${all-in-one vm external IP} 8020
  Trying ${all-in-one vm external IP}...
  telnet: connect to address ${all-in-one vm external IP} Connection refused
  [cloudera@localhost ~]$ telnet 127.0.0.1 8020
  Trying 127.0.0.1...
  Connected to 127.0.0.1.
  Escape character is '^]'
  </code></pre>
  
  <p>my remote machine has all the configuration(<code>core-site.xml, hdfs-site.xml</code>) pointing to the <code>${all-in-one vm external IP}</code>. When I run something from the remote client and I get this:</p>
  
  <pre><code>└ $ ./bin/hdfs --config /home/${myself}/hadoop-2.0.0-cdh4.3.0/etc/hadoop dfs -ls
  13/10/27 05:27:53 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
  ls: Call From ubuntu/127.0.1.1 to ${all-in-one vm external IP}:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
  </code></pre>
  
  <p>I changed my hadoop all-in-one vm:
  <code>core-site.xml and hdfs-site.xml</code>  under <code>/etc/hadoop/conf</code> from:<code>localhost.localdomain</code> -> <code>${all-in-one vm external IP},</code> but after restarting hdfs, it still listens to localhost 8020. any ideas? How can I make it listen to ${external IP} on 8020 instead of localhost.</p>