I gave this general overview yesterday on the many aspects of securing and scaling web sites to the (first) [Central Wisconsin IT Conference] (http://cwitc.org). My hope was that it would trigger / jostle people into looking deeper into something I mentioned.
Probably the most fun part of this talk was picking the photos to include 
https://www.wildcardcorp.com/blog/deploying-secure-enterprise-scale-web-sites/view