Forum Discussion

Stivet's avatar
Stivet
Level 4
10 years ago

NDMP Backup error: ndmp_data_connect_v3 failed

Hi All, I have a problem with NDMP Remote Backup of NAS: DELL FS8600. When running the backup this error is displayed in ndmpagent log:   Connecting and authenticating to NAS server fs_user_...
7.6
Agents
Backing Up
Backup and Recovery
Linux
NDMP Option
NetBackup
  • mnolan's avatar
    mnolan
    10 years ago

    So first things first, this is either a remote NDMP connecting back to the media server to send data or during other NDMP backups, the meta data. I am guessing the former.

    Per the info "config file: NDMP_DATA_CONNECTION_HOST_NAME=alcala"

    Your ndmp.cfg has the info to tell the filer to come back to ALCALA to send data no matter the actual media server network interface that is talking with the filer for the managment NDMP connection.

    Per the info "Listen address = 157.253.77.49 port 2859"

    ALCALA's IP address is 157.253.77.49 and has an NDMP server listening at port 2859.

    Port 2859 is within the default range for SERVER_PORT_WINDOW, which is 1025-5000, this range is used as random to open a server for other devices to connect to without keeping it at a constant port that can be attacked.

    Per the info "ndmp_data_connect failed, status = 23 (NDMP_CONNECT_ERR)"

    Your filer attempted to connect to 157.253.77.49 port 2859 and failed.

    Please ensure that both software and hardware firewalls allow this filer to connect to that address on the TCP bidirectional port range 1025-5000

     

mnolan's avatar
mnolan
Level 6
10 years ago

So first things first, this is either a remote NDMP connecting back to the media server to send data or during other NDMP backups, the meta data. I am guessing the former.

Per the info "config file: NDMP_DATA_CONNECTION_HOST_NAME=alcala"

Your ndmp.cfg has the info to tell the filer to come back to ALCALA to send data no matter the actual media server network interface that is talking with the filer for the managment NDMP connection.

Per the info "Listen address = 157.253.77.49 port 2859"

ALCALA's IP address is 157.253.77.49 and has an NDMP server listening at port 2859.

Port 2859 is within the default range for SERVER_PORT_WINDOW, which is 1025-5000, this range is used as random to open a server for other devices to connect to without keeping it at a constant port that can be attacked.

Per the info "ndmp_data_connect failed, status = 23 (NDMP_CONNECT_ERR)"

Your filer attempted to connect to 157.253.77.49 port 2859 and failed.

Please ensure that both software and hardware firewalls allow this filer to connect to that address on the TCP bidirectional port range 1025-5000