title: Kafka and firewall rules
body: <p>We have a fairly strict network segmentation policy. I am using a cloud foundry instance to deploy an app to. The firewall rules have been set up to reach the kafka cluster from within the cloud foundry instance. I believe that the firewall rules have also been set up to get to the zookeeper instance as well. I need to actually confirm that one.</p>
  
  <p>My problem seems to be that I can produce messages to kafka, but my consumer doesn't seem to be picking them up. It seems to hang while "polling".</p>
  
  <p>Is there some hidden hosts or ports that I need to deal with for my firewall rules that are not just the standard hosts and ports to the kafka and zookeeper nodes?</p>