| xref:raddb/mods-available/etc_group.adoc[etc_group] | Allow users to be assigned to one or more groups to permit different levels of access.
| xref:raddb/mods-available/files.adoc[files] | Implements a traditional Livingston-style users file.
| xref:raddb/mods-config/files/users.adoc[file format] | A users file example.
+| xref:raddb/mods-available/kv.adoc[kv] | A simple memory-only key-value store.
| xref:raddb/mods-available/ldap.adoc[ldap] | Allows LDAP directory entries to be retrieved, modified, inserted and deleted.
| xref:raddb/mods-available/opendirectory.adoc[opendirectory] | Integrates with an Apple OpenDirectory service on the same host as FreeRADIUS to allow OpenDirectory users to authenticate.
| xref:raddb/mods-available/passwd.adoc[passwd] | Reads and caches line-oriented files that are in a format similar to ``/etc/passwd``.