I am trying to setup a SharePoint website that supports adding SharePoint apps to that website. I started by following these instructions:
Configure an environment for apps for SharePoint (SharePoint 2013)
NOTES from that install:
1) We are using SSL for ALL websites in our farm
2) All websites (besides built-in) use port 443 including the central admin site
3) We use host headers so sites can share port 443 on the same IP Address
4) We have two domains: (1) is https://portal.mysite.com (for internal and external users), and (2) How to: Create high-trust apps for SharePoint 2013 using the server-to-server protocol (advanced topic)
That topic is too vague. It is not really clear which certificate to use, or what domain to use (which domain issuer). It really doesn't do what I need: step-by-step get a website trusting an application so the credentials are auto-passed and two or more login prompts are not necessary. The "devil" (so-to-speak) is always in the details and this is driving me crazy.