networks.4 (2010 09)

networks(4) networks(4)

NAME

networks - network name data base

DESCRIPTION

The

/etc/networks

ﬁle associates Internet (IP) addresses with ofﬁcial network names and aliases.

This allows the user to refer to a network by a symbolic name instead of using an Internet address. For

each network, a single line should be present with the following information:

<ofﬁcial network name> <network number> <aliases>

Aliases are other names under which a network is known. For example:

loop 192.46.4 testlan

where the network named loop is also called

testlan.

A line cannot start with a blank (tab or space character). Items are separated by any number or combina-

tion of blanks. A

# character indicates the beginning of a comment. Characters from the

# up to the

end of the line are not interpreted by routines which search the ﬁle. Trailing blanks are allowed at the

end of a line. For the Internet, this ﬁle is normally created from the ofﬁcial network database maintained

at the Network Information Control Center (NIC), though local changes may be required to bring it up-

to-date regarding unofﬁcial aliases and/or unknown networks.

Network numbers can be speciﬁed in conventional Internet dot notation using the

inet_network()

routine from the internet address manipulation library (see inet (3N). Network names can contain any

printable character other than a white space, new-line, or comment character.

EXAMPLES

See

/etc/networks.

AUTHOR

networks was developed by the University of California, Berkeley.

FILES

/etc/networks

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networks(4) networks(4) NAME networks - network name data base DESCRIPTION The /etc/networks file associates Internet (IP) addresses with official network names and aliases. This allows the user to refer to a network by a symbolic name instead of using an Internet address. For each network, a single line should be present with the following information: Aliases are other names under which a network is known. For example: loop 192.46.
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(Notes) A (Notes) nA 2 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010