After having seen how configure the FBA with the SqlMembershipProvider, here I describe how setup the FBA with the LdapMembershipProvider, allowing Active Directory authentication (this could be useful, for example, for extranets).
The trick is simply to create the web application with Claims Based Autentication, give names to the membership manager and to the role manager, and modify the web.config files of:
- Central Administration
- Security Token Service
- web application
configuring in this way:
I've found a useful guide in this article: Configure forms-based authentication for a claims-based Web application (SharePoint Server 2010).