title: docker: networking without linking
body: <p>I have the following setup running on one host:</p>
  
  <ul>
  <li>1 container with nginx: this one serves as reverse proxy for some webservices</li>
  <li>x container offering webservices, having exposed a port to the host</li>
  <li>x "oldschool"/non dockerized webservices</li>
  </ul>
  
  <p>when configuring nginx to proxy to "localhost:$EXPOSED_OR_NATIVE_PORT", this does not work, because nginx can't connect to this port.
  How do I have to configure the dockerized nginx in order to serve as proxy for container and standard services?</p>
  
  <p>Linking nginx with the docker webserives might be one solution, although i don't like the idea to have all containers linked to the nginx. And this does not solve the problem, that this nginx should also serve as reverse for standard services on this host.</p>
  
  <p>Any idea/recommendation?</p>
  
  <p>Thanks</p>