Port requirements for NDMP backups
Network data management protocol (NDMP) storage unit backups require that specific ports be open in a firewall environment. The backup type determines the ports that need to be opened in the firewall.
The following table explains the ports requirements for NDMP backups.
Table: Ports requirements for NDMP backups
Backup type | Description |
|---|---|
Local | For local operations, the Data Management Application (DMA) needs access to port 10000 on the NDMP server. In this case, the one NDMP server is both the NDMP tape server and the NDMP data server. |
Three-way and remote NDMP | For three-way and remote NDMP, the DMA needs access to port 10000 on the NDMP tape server and the NDMP data server. There cannot be a firewall between the NDMP tape server and the NDMP data server. No firewall is needed because control is not required over the TCP/IP ports that are used for the data movement. |
On UNIX systems, the NetBackup avrd process uses the Internet Control Message Protocol (ICMP) when it pings the NDMP hosts to verify network connectivity. If a ping fails, NetBackup skips this particular device, which leaves the status of the drive as up.
On Windows systems, NetBackup does not ping the NDMP device. It tries the connection. If the network experiences connectivity problems, this method can take longer as NetBackup waits for a timeout.