The crux of my trouble came down to two firewalls running (IPTables and FirewallD, but I was only disabling/configuring one of them. Read the post for more details.
If you are still running into troubles after that, feel free to ask any questions and I’ll assist where I can. If you can outline your Method of Procedure (MOP) obscuring any sensitive details and any output, OS / Version, HAA Install Script / Version, etc. would help to provide suggestions.