title: iscsiadm: Login I/O error, failed to receive a PDU
body: <p>I'm trying to discover an iscsi target and am getting the following error:</p>
  
  <pre><code>iscsiadm: Connection to Discovery Address 172.18.1.4 closed
  iscsiadm: Login I/O error, failed to receive a PDU
  </code></pre>
  
  <p>My target config is the following:</p>
  
  <pre><code>&lt;target iqn.2012-4.com.mylab:first &gt;
      backing-store /dev/vgsrv/storage
      initiator-address 172.18.1.1
  &lt;/target&gt;
  </code></pre>
  
  <p>Here are my details:</p>
  
  <pre><code>my initiator IP : 172.18.1.4
  my target IP : 172.18.1.1
  kernel : Linux 2.6.32-504.el6.x86_64 
  iscsid version 6.2.0-873.13.el6
  </code></pre>
  
  <p>Any tips why I'm facing this issue? All firewalls and ips are off. </p>