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The protocols file contains a list of protocols known to the system,
plus the identification number and one or more aliases for each. It is
unlikely that you will need to edit the protocols file, but you may need to
install and link it.
Creating and Linking Protocols File
You may already have a protocols file installed on your system. If you know
that you have such a file, and it is accessible by the POSIX file name
/etc/protocols you may skip these steps.
If not, follow the steps below to create and link the protocols file,
PROTOCOL.NET.SYS. If you have such a file, but are unsure whether or
not it is linked, perform step 2 only.
- Use the COPY command to create the protocols file. Enter:
:COPY PROTSAMP.NET.SYS, PROTOCOL.NET.SYS
Make sure that you enter the singular form of protocol in the new MPE
file name. That is, "PROTOCOL" and not "PROTOCOLS" should appear on the
right side of the COPY command.
- Create a symbolic link from /etc/protocols in the POSIX name
space to PROTOCOL.NET.SYS. Enter:
:NEWLINK /etc/protocols, PROTOCOL.NET.SYS
Again, make sure that you enter the singular form of protocol in the new
MPE file name PROTOCOL.NET.SYS.
Viewing Protocols File
Use an MPE text editor to open the file. It is unlikely that you will need to
edit the file, but you can look at it now to familiarize yourself with its
contents.
# This file associates protocol numbers with official protocol names
# and aliases. This allows the user to refer to a protocol by a
# symbolic name instead of a number. For each protocol a single
# line should be present with the following information:
#
# The form for each entry is:
# <official protocol name> <protocol number> <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.
#
11 tcp 6 TCP # transmission control protocol
12 udp 17 UDP # user datagram protocol
Other Sources of Information
You may find the following books useful when you are working with Internet
Services:
- Unix Network Programming written by W. Richard Stevens. New
Jersey: Prentice Hall, 1990
- Telnet/iX User's Guide
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