title: Accessing redis from a docker container
body: <p>Simple question - I hope.</p>
  
  <p>I am trying to communicate to a redis instance running on Amazon elastic cache from a docker container on an amazon ec2 machine. I can connect without problems to the redis instance from the ec2 machine host (which would seem to indicate that this is not a security/ports problem) but I get a timeout when trying to connect from within the docker container. What am I missing? </p>