Applies to ONTAP 9 Netgroups Export-policy Issue Intermittent NFS authentication failure. Export policy rule contains a netgroup ONTAP will perform a PTR (reverse DNS lookup) of the ip of client to ob...Applies to ONTAP 9 Netgroups Export-policy Issue Intermittent NFS authentication failure. Export policy rule contains a netgroup ONTAP will perform a PTR (reverse DNS lookup) of the ip of client to obtain hostname to check in netgroups