1 IPB Internal The standard method of authentication internal 0 1 0 0 username 1 2 LDAP Authentication LDAP / Active Directory Authentication ldap 1 0 1 0 username 4 6 External Database Authentication via an external database external 0 0 1 0 username 5 4 IP.Converge Internal Use Only ipconverge 0 0 1 0 email 3