Have not looked into NDMP backups for a while but could it just be that the 
authentication fails?
Remember that there is no NW client software running on the filers which can 
generate self-signed certificates.
In this case i guess you must whith authentication method to oldauth.

The manuals should provide more info.

Regards

+----------------------------------------------------------------------
|This was sent by carsten_reinfeld AT avus-cr DOT de via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------