Applies to ONTAP 9 Answer LDAPS via TCP/636 is supported in ONTAP 9.5 and later. Additional Information ONTAP 9 also supports 'signing and sealing' for LDAP connections. For more information on ... Applies to ONTAP 9 Answer LDAPS via TCP/636 is supported in ONTAP 9.5 and later. Additional Information ONTAP 9 also supports 'signing and sealing' for LDAP connections. For more information on signing and sealing, see How to set ONTAP to use LDAP Signing or Sealing for CIFS/NFS