Description of problem:
When you connect from a pod to a service, the connection doesn't go through.

Version-Release number of selected component (if applicable):
 $ openshift version
   openshift v3.5.5.26
   kubernetes v1.5.2+43a9be4
   etcd 3.1.0

How reproducible:
can be reproduced

Steps to Reproduce:
1. Deploy a multi-tiered application. As an example I have used the lab and code from here
https://github.com/RedHatWorkshops/openshiftv3-workshop/blob/master/5_Using_templates.md
My intent is add a network policy to allow connects to mysql pod from the frontend pod.

2. Add network policies
a) oc annotate namespace ${ns}
'net.beta.kubernetes.io/network-policy={"ingress":{"isolation":"DefaultDeny"}}'
b) allow router to connect to your frontend pod by allowing traffic on port 8080
# cat allow-8080.yaml 
kind: NetworkPolicy
apiVersion: extensions/v1beta1
metadata:
  name: allow-8080-and-8443 
spec:
  podSelector:
  ingress:
  - ports:
    - protocol: TCP
      port: 8080
c) allow your mysql pod connections from the frontend pod. Remember to replace the frontend pod's label for app: <<your label>>
# cat allow-3306.yaml 
kind: NetworkPolicy
apiVersion: extensions/v1beta1
metadata:
  name: allow-3306
spec:
 podSelector:
 ingress:
 - from: 
   - podSelector:
       matchLabels:
         app: <<your label>>
 - ports:
   - protocol: TCP
     port: 3306



3. If you try to call the application URL. In my case it was http://frontend-networkpolicy.apps.devday.ocpcloud.com/, that would work
But if you try 
http://frontend-networkpolicy.apps.devday.ocpcloud.com/dbtest.php which connects to the database (via MYSQL service that proxies the pod), it won't work

4. Now find the pod's ip address (run oc get pods -o wide) and change the code for dbtest.php by getting into the terminal for the frontend pod to connect to the pod directly. And then test the <<yoururl>>/dbtest.php
The the call will go through

Actual results:

connection via service doesn't work. But connection directly to the pod works

Expected results:
connections via service should work

Additional info:
Look at the recordings to see how I tested it. Note there are 2 chapters. See the first 6 mins in Chapter1 and then Chapter 2.
https://bluejeans.com/s/URf12