Merging upstream version 6.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 204 deletions

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-.\" Copyright (c) 1997 Martin Schulze (joey@infodrom.north.de)
-.\" Much of the text is copied from the manpage of resolv+(8).
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.\" 2003-08-23 Martin Schulze <joey@infodrom.org> Updated according to glibc 2.3.2
-.TH host.conf 5 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-host.conf \- resolver configuration file
-.SH DESCRIPTION
-The file
-.I /etc/host.conf
-contains configuration information specific to the resolver library.
-It should contain one configuration keyword per line, followed by
-appropriate configuration information.
-The following keywords are recognized:
-.TP
-.I trim
-This keyword may be listed more than once.
-Each time it should be
-followed by a list of domains, separated by colons (\[aq]:\[aq]), semicolons
-(\[aq];\[aq]) or commas (\[aq],\[aq]), with the leading dot.
-When set, the
-resolver library will automatically trim the given domain name from the
-end of any hostname resolved via DNS.
-This is intended for use with
-local hosts and domains.
-(Related note:
-.I trim
-will not affect hostnames gathered via NIS or the
-.BR hosts (5)
-file.
-Care should be taken to
-ensure that the first hostname for each entry in the hosts file is
-fully qualified or unqualified, as appropriate for the local
-installation.)
-.TP
-.I multi
-Valid values are
-.IR on " and " off .
-If set to
-.IR on ,
-the resolver library will return all valid addresses for a host that
-appears in the
-.I /etc/hosts
-file,
-instead of only the first.
-This is
-.I off
-by default, as it may cause a substantial performance loss at sites
-with large hosts files.
-.TP
-.I reorder
-Valid values are
-.IR on " and " off .
-If set to
-.IR on ,
-the resolver library
-will attempt to reorder host addresses so that local addresses
-(i.e., on the same subnet) are listed first when a
-.BR gethostbyname (3)
-is performed.
-Reordering is done for all lookup methods.
-The default value is
-.IR off .
-.SH ENVIRONMENT
-The following environment variables can be used to allow users to
-override the behavior which is configured in
-.IR /etc/host.conf :
-.TP
-.B RESOLV_HOST_CONF
-If set, this variable points to a file that should be read instead of
-.IR /etc/host.conf .
-.TP
-.B RESOLV_MULTI
-Overrides the
-.I multi
-command.
-.TP
-.B RESOLV_REORDER
-Overrides the
-.I reorder
-command.
-.TP
-.B RESOLV_ADD_TRIM_DOMAINS
-A list of domains,
-separated by
-colons (\[aq]:\[aq]), semicolons (\[aq];\[aq]), or commas (\[aq],\[aq]),
-with the leading dot,
-which will be added to the list of domains that should be trimmed.
-.TP
-.B RESOLV_OVERRIDE_TRIM_DOMAINS
-A list of domains,
-separated by
-colons (\[aq]:\[aq]), semicolons (\[aq];\[aq]), or commas (\[aq],\[aq]),
-with the leading dot,
-which will replace the list of domains that should be trimmed.
-Overrides the
-.I trim
-command.
-.SH FILES
-.TP
-.I /etc/host.conf
-Resolver configuration file
-.TP
-.I /etc/resolv.conf
-Resolver configuration file
-.TP
-.I /etc/hosts
-Local hosts database
-.SH NOTES
-The following differences exist compared to the original implementation.
-A new command
-.I spoof
-and a new environment variable
-.B RESOLV_SPOOF_CHECK
-can take arguments like
-.IR off ", " nowarn ", and " warn .
-Line comments can appear anywhere and not only at the beginning of a line.
-.SS Historical
-The
-.BR nsswitch.conf (5)
-file is the modern way of controlling the order of host lookups.
-.P
-In glibc 2.4 and earlier, the following keyword is recognized:
-.TP
-.I order
-This keyword specifies how host lookups are to be performed.
-It should be followed by one or more lookup methods, separated by commas.
-Valid methods are
-.IR bind ", " hosts ", and " nis .
-.TP
-.B RESOLV_SERV_ORDER
-Overrides the
-.I order
-command.
-.P
-.\" commit 7d68cdaa4f748e87ee921f587ee2d483db624b3d
-Since glibc 2.0.7, and up through glibc 2.24,
-the following keywords and environment variable
-have been recognized but never implemented:
-.TP
-.I nospoof
-Valid values are
-.IR on " and " off .
-If set to
-.IR on ,
-the resolver library will attempt to prevent hostname spoofing to
-enhance the security of
-.BR rlogin " and " rsh .
-It works as follows: after performing a host address lookup,
-the resolver library will perform a hostname lookup for that address.
-If the two hostnames
-do not match, the query fails.
-The default value is
-.IR off .
-.TP
-.I spoofalert
-Valid values are
-.IR on " and " off .
-If this option is set to
-.I on
-and the
-.I nospoof
-option is also set,
-the resolver library will log a warning of the error via the
-syslog facility.
-The default value is
-.IR off .
-.TP
-.I spoof
-Valid values are
-.IR off ", " nowarn ", and " warn .
-If this option is set to
-.IR off ,
-spoofed addresses are permitted and no warnings will be emitted
-via the syslog facility.
-If this option is set to
-.IR warn ,
-the resolver library will attempt to prevent hostname spoofing to
-enhance the security and log a warning of the error via the syslog
-facility.
-If this option is set to
-.IR nowarn ,
-the resolver library will attempt to prevent hostname spoofing to
-enhance the security but not emit warnings via the syslog facility.
-Setting this option to anything else is equal to setting it to
-.IR nowarn .
-.TP
-.B RESOLV_SPOOF_CHECK
-Overrides the
-.IR nospoof ", " spoofalert ", and " spoof
-commands in the same way as the
-.I spoof
-command is parsed.
-Valid values are
-.IR off ", " nowarn ", and " warn .
-.SH SEE ALSO
-.BR gethostbyname (3),
-.BR hosts (5),
-.BR nsswitch.conf (5),
-.BR resolv.conf (5),
-.BR hostname (7),
-.BR named (8)