|PROTOCOLS(5)||Linux Programmer's Manual||PROTOCOLS(5)|
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:
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:
- the native name for the protocol. For example ip, tcp, or udp.
- the official number for this protocol as it will appear within the IP header.
- 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.
- The protocols definition file.