I'm using Cloudbreak 2.7.1 and I'm in a locked down environment with proxy set up.
I was able to configure everything properly, cbd can talk to my cluster and the basic cluster was deployed successfully.
However, that's not the case when I enable Knox Gateway on a cloudbreak level. The whole installation fails.
I think it's a bug (knox is not ambari managed, so I guess it's installed in different way and it doesnt respect proxy env vars or similar) , which I don't know how to resolve.
This is currently a blocker for me.