Technical data

Conﬁguring the Portmapper

The Portmapper service eliminates the need to preconﬁgure all client and server

remote procedure call (RPC) applications with the port numbers they use. The

Portmapper ‘‘listens’’ at port 111 and maintains a database of registered server

programs, their unique program numbers, and assigned port numbers.

This chapter describes:

• How to conﬁgure the services that use RPC with information that the

Portmapper needs (Section 11.1)

• How to start up and shut down the Portmapper (Section 11.2)

• How to display Portmapper settings (Section 11.3)

For information about programming with the RPC application programming

interface (API), see the DIGITAL TCP/IP Services for OpenVMS ONC RPC

Programming manual.

11.1 Conﬁguring Services to Use the Portmapper

You must run the Portmapper if you intend to use the following applications:

• MOUNT

• NFS Server

• PC-NFS

• Any customer-developed programs that use RPC

When you conﬁgure these services with TCPIP$CONFIG, you will be

automatically prompted to set up the Portmapper service. The Portmapper

service is then started when you start TCP/IP Services.

The SET SERVICE command conﬁgures the applications so they are known to

the Portmapper. To set RPC-related parameters, use the /RPC qualiﬁer. Enter:

TCPIP> SET SERVICE service -

_TCPIP> /RPC=(PROGRAM_NUMBER=n, VERSION_NUMBER=(LOWEST=n, HIGHEST=n))

The TCPIP services that use the Portmapper have the following default values

for the /RPC qualiﬁer:

Service

Default Program

Number

Default Lowest

Version Default Highest Version

MOUNT 100005 1 3

NFS Server 100003 2 3

Conﬁguring the Portmapper 11–1