I have an Apache server (RHEL 6) hosting multiple user web pages which currently is connected to my Active Directory environment to authenticate users. The server is used to automatically host content the users put in their /home/<user>/public_html folder. I am also configuring this server to use chroot so the users will not be able to browse any other content on the server outside of their home folder. The login scripts do not create a home folder for the users. Those are created manually because we only want certain users to be able to host web pages from this server.
The problem is, any user is currently able to log into the server and instead of going to their /home folder (because it doesn't exist) they automatically go into /. This gives them access to view any files/folders on the server their group has read access to. This is a security concern and I'd like to restrict logins to users who have a /home directory. We don't want to specify an AD group or list of users as authenticated because that list may get quite long and be difficult to manage although it may be easier than writing a PAM module.
Is there a way to restrict LDAP logins to only users who already have a /home directory? I am not finding anything in the PAM options or documentation.