Understanding Sun RPC Services

Sun RPC, also known as Open Network computing remote procedure call (ONC RPC), provides a way for a program running on one host to call procedures in a program running on another host. Sun RPC services are defined by a program identifier. The program identifier is independent of any transport address, and most of the Sun RPC sessions are initiated through TCP or UDP port 111. Each host links the required RPC service to a dynamic TCP or UDP port that is negotiated over the port 111 control channel, allowing the client to connect to either TCP or UDP port 111.

Predefined Sun Microsystems remote procedure call (Sun RPC) services include:

The Sun RPC ALG can be applied by using the following methods:

Table 2 lists predefined Sun RPC services, a program identifier associated with each service, and a description of each service.

Table 2: Predefined Sun RPC Services

Service

Program ID

Description

PORTMAP

100000

Sun RPC Portmapper protocol is a TCP or UDP port-based service that includes TCP or UDP port 111.

NFS

100003

Sun RPC Network File System.

MOUNT

100005

Sun RPC mount process.

YPBIND

100007

Sun RPC Yellow Page Bind service.

STATUS

100024

Sun RPC status.

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