Configuring and Managing MPE/iX Internet Services (August 2002)

Chapter 1

Introduction to Internet Services

Services File

The services file associates an official service name and alias with the port number and protocol that a service

uses. You will edit the services file for each new service that you want to add to your system. The remaining

chapters in this book, which describe the configuration of individual services, will assume that you know the

following information. And, of course, you can refer back to this section as needed.

Creating and Linking the Services File

You may already have a services file installed on your system. If you know that you have such a file, and it is

accessible by the POSIX file name /etc/services you may skip these steps.

If you do not have a services file, follow these steps to create the file and link to it. If you have such a file, but

are unsure whether or not it is linked, perform step 2 only.

1. Create your own services file by using the COPY command to rename the sample file. Enter:

:COPY SERVSAMP.NET.SYS, SERVICES.NET.SYS

2. Create a symbolic link from a file named /etc/services in the POSIX name space to

SERVICES.NET.SYS. Enter:

:NEWLINK /etc/services, SERVICES.NET.SYS

Editing the Services File

Use an MPE text editor to edit the file.

1. Open the services file with an MPE text editor.

The contents will resemble the following:

# This file contains the information about the services provided.

# Copy this file to SERVICES.NET.SYS if that file does not already exist.

# The form for each entry is:

# <official service name> <port number/protocol name> <aliases>

# See the Configuring and Managing MPE/iX Internet Services Manual

# for more information (HP Part No. 32650-90835).

# Note: The entries cannot be preceded by a blank space.

echo 7/tcp # Echo

echo 7/udp #

discard 9/tcp sink null # Discard

discard 9/udp sink null #

daytime 13/tcp # Daytime

daytime 13/udp #

chargen 19/tcp ttytst source # Character Generator

chargen 19/udp ttytst source #

ftp 21/tcp

telnet 23/tcp

time 37/tcp timeserver # Time

time 37/udp timeserver #

domain 53/tcp nameserver # Domain Name Service

domain 53/udp nameserver #

bootps 67/udp # Bootstrap Protocol Server

bootpc 68/udp # Bootstrap Protocol Client

tftp 69/udp # Trivial File Transfer Protocol

DAServer 987/tcp # SQL distributed access

shell 514/tcp cmd # Remote command no password used