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Veritas NetBackup™ Security and Encryption Guide

Last Published: 2017-09-25

Product(s): NetBackup (8.1)

About NetBackup TCP/IP ports

Like other application software, NetBackup sends data packets to the network and receives data packets from the network. The operating system organizes these data packets into queues, which are known in TCP/IP terminology as ports. All NetBackup data communication uses the TCP/IP protocol.

NetBackup uses two classes of ports: reserved ports and non-reserved ports. These ports are as follows:

Reserved ports are numbered less than 1024 and typically are accessible only to operating system components.
NetBackup master servers use reserved ports to communicate with older revisions of NetBackup software that reside on clients, media servers, and other NetBackup components on the network. These are sometimes called back-rev connections. Callback is used only for back-rev connections.
Nonreserved ports are numbered at 1024 and above. User applications can access these ports.

Some NetBackup ports are registered with the Internet Assigned Numbers Authority (IANA) and other NetBackup ports are assigned dynamically. Table: Ports that NetBackup uses to enable TPC/IP connections explains these ports.

Table: Ports that NetBackup uses to enable TPC/IP connections

Port	Description
Registered ports	Specifies ports that are registered with the Internet Assigned Numbers Authority (IANA) and are assigned permanently to specific NetBackup services. For example, the port for the NetBackup client daemon, bpcd, is 13782. You can specify entries in the following files if you need to override the default port numbers: On UNIX systems, you can specify ports in the /etc/services file. On Windows systems, you can specify ports in the %systemroot%\System32\drivers\etc\services file.
Dynamically allocated ports	Specifies ports that are assigned from the ranges you specify on NetBackup clients and servers. You can configure NetBackup to select a port number at random from the allowed range, or you can configure NetBackup to start at the top of a range and use the first port available.

Port

Description

Registered ports

Specifies ports that are registered with the Internet Assigned Numbers Authority (IANA) and are assigned permanently to specific NetBackup services. For example, the port for the NetBackup client daemon, bpcd, is 13782. You can specify entries in the following files if you need to override the default port numbers:

On UNIX systems, you can specify ports in the /etc/services file.
On Windows systems, you can specify ports in the
%systemroot%\System32\drivers\etc\services file.

Dynamically allocated ports

Specifies ports that are assigned from the ranges you specify on NetBackup clients and servers.

You can configure NetBackup to select a port number at random from the allowed range, or you can configure NetBackup to start at the top of a range and use the first port available.

Caution:

Veritas recommends that you use the default port number settings for NetBackup services and internet service ports.

If you modify the port number for a daemon, ensure that the daemon's port number is identical for all NetBackup master servers, media servers, and client systems that communicate with each other. If you ever need to contact Veritas Technical Services, inform the technical support representative of all nonstandard ports in your NetBackup environment.

The following other guides contain information about NetBackup ports:

The following topics contain information about NetBackup ports: