NAME | DESCRIPTION | FILES | SEE ALSO | COLOPHON
PROTOCOLS(5) Linux Programmer's Manual PROTOCOLS(5)
protocols - the protocols definition file
This file is a plain ASCII file, describing the various DARPA internet
protocols that are available from the TCP/IP subsystem. It should be
consulted instead of using the numbers in the ARPA include files, or, even
worse, just guessing them. These numbers will occur in the protocol field of
any IP header.
Keep this file untouched since changes would result in incorrect IP packages.
Protocol numbers and names are specified by the IANA (Internet Assigned
Numbers Authority).
Each line is of the following format:
protocol number aliases ...
where the fields are delimited by spaces or tabs. Empty lines are ignored.
If a line contains a hash mark (#), the hash mark and the part of the line
following it are ignored.
The field descriptions are:
protocol
the native name for the protocol. For example ip, tcp, or udp.
number the official number for this protocol as it will appear within the IP
header.
aliases
optional aliases for the protocol.
This file might be distributed over a network using a network-wide naming
service like Yellow Pages/NIS or BIND/Hesiod.
/etc/protocols
The protocols definition file.
getprotoent(3)
http://www.iana.org/assignments/protocol-numbers
This page is part of release 3.23 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
Linux 2008-09-23 PROTOCOLS(5)