FreeIPA 4 server FreeIPA is an integrated identity and authentication solution with Kerberos, LDAP, PKI, and web UI. Enable this option if you plan to provide a FreeIPA server. Enable the 'dns' service if this FreeIPA server provides DNS services, 'ntp' service if this FreeIPA server provides NTP services, and 'freeipa-trust' for cross-forest trusts with Active Directory.