Hi Markus:
From your description, my guess is that you might be pointing to the wrong port.
When the blog says this:
Now you can access your application on both of your cluster instances by directly pointing your browser to each server instances. (eg <host1>:<httpport> and <host2>:<httpport>).
This does not mean port 80. That is the port of the DAS. I believe by default that the http ports for the instances are 38080, 38081 for a two instance cluster. Give that a try.
hope this helps
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