Port Configuration - Modification Guidelines

The following guidelines apply to modifying the ports configuration file:

Changing port numbers requires the Arcserve Backup ServiceName. For more information about service names, see the section Port Configuration - Additional Resources.
Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Open Network Computing Remote Procedure Call (ONCRPC) services require only one port. If you do not provide a port number for these services, the default port is used.
Microsoft Remote Procedure Call (MSRPC) services require only the Arcserve Backup service name (ServiceName). Arcserve Backup MSRPC based services use system assigned port numbers.
You can use the key RPCServices for all Remote Procedure Call (RPC) services. This key lets Arcserve Backup use system assigned ports for all Arcserve Backup RPC based services.
Changing the port configuration file on one Arcserve Backup server for MSRPC based services does not ensure that Arcserve Backup applies the changes to all remote Arcserve Backup servers. You should modify the port configuration file on all remote Arcserve Backup servers.
For TCP communication-based services, you can specify different port ranges for different host names with many IP addresses.
You should specify an IP address only if a machine has more than one network interface card (NIC) and you want to use a specific NIC for TCP communication.

More information: