I am just beginning sharepoint development, and am trying to select the appropriate solution model - app or farm - for a login solution. In this particular case I have a set of portals ( ie host named site collections with subsites ), which are protected by forms based authentication in one zone, and AD authentication in another.
Users would come to portals.mycompany.com, for example, which would expose the fba zone, supply credentials and then be routed to the first site collection or subsite to which they are authorized (shared). A user should have only 1 authorized hnsc, though possibly multiple subsites to which he is granted access.
The system would operate at the web application level as I understand it. would a sharepoint app suffice, or would a farm solution be required?