We are in the process of redoing our wireless access network and would like to know if there is any method to get Windows clients/users access to the network using 802.1x WITHOUT having an Active Directory server for authentication and WITHOUT installing additional software on each and every client. Note that we already use Radius servers, LDAP servers (all on CentOS). Users employ a variety of clients including Windows, Mac, Linux, Android, iOS.
802.1x does not use AD authentication normally - just RADIUS. RADIUS normally gets its information from AD, but that's only an option, not a requirement.
You could also use anything for authentication, e.g. a normal text-file accessed by freeradius.
The only problem is - it tends to get a little more work than AD.