6b6ac9438f
package does have BXA export approval, but the licensing strings on the dnssafe code are a bit unpleasant. The crypto is easy to restore and bind will run without it - just without full dnssec support. Obtained from: The Internet Software Consortium (www.isc.org)
202 lines
7.1 KiB
Groff
202 lines
7.1 KiB
Groff
.\" Copyright (c) 1996,1999 by Internet Software Consortium
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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.\" ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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.\" CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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.\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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.\" PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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.\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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.\" SOFTWARE.
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.\"
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.\" Copyright (c) 1986, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: irs.conf.5,v 8.4 1999/01/18 07:46:45 vixie Exp $
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.\"
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.Dd November 16, 1997
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.Dt IRS.CONF 5
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.Os BIND 8.1
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.Sh NAME
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.Nm irs.conf
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.Nd Information Retrieval System configuration file
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.Sh SYNOPSIS
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.Nm irs.conf
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.Sh DESCRIPTION
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The
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.Xr irs 3
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functions are a set of routines in the C library which provide access to
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various system maps.
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The maps that irs currently controls are the following: passwd, group,
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services, protocols, hosts, networks and netgroup.
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When a program first calls a function that accesses one of these maps,
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the irs configuration file is read,
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and the source of each map is determined for the life of the process.
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.Pp
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If this file does not exist,
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the irs routines default to using local sources for all information,
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with the exception of the host and networks maps,
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which use the Domain Name System (DNS).
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.Pp
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Each record in the file consists of one line.
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A record consists of a map-name, an access-method and possibly a (comma
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delimited) set of options,
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separated by tabs or spaces.
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Blank lines, and text between a # and a newline are ignored.
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.Pp
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Available maps:
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.Bd -literal -offset indent
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Map name Information in map
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========= ==================================
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passwd User authentication information
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group User group membership information
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services Network services directory
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protocols Network protocols directory
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hosts Network hosts directory
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networks Network "network names" directory
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netgroup Network "host groups" directory
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.Ed
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.Pp
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Available access methods:
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.Bd -literal -offset indent
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Access method Description
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============= =================================================
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local Use a local file, usually in /etc
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dns Use the domain name service (includes hesiod)
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nis Use the Sun-compatible Network Information Service
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irp Use the IRP daemon on the localhost.
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.Ed
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.Pp
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Available options:
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.Bd -literal -offset indent
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Option Description
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======== ================================================
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continue don't stop searching if you can't find something
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merge don't stop searching if you CAN find something
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.Ed
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.Pp
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The continue option creates
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.Dq "union namespaces"
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whereby subsequent access methods of the same map type can be tried
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if a name cannot be found using earlier access methods.
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This can be quite confusing in the case of host names,
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since the name to address and address to name mappings can be visibly
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asymmetric even though the data used by any given access method is
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entirely consistent. This behavior is, therefore, not the default.
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.Pp
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The merge option only affects lookups in the groups map.
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If set, subsequent access methods will be tried in order to cause
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local users to appear in NIS (or other remote) groups in addition
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to the local groups.
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.Sh EXAMPLE
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.Bd -literal -offset indent
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# Get password entries from local file, or failing that, NIS
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passwd local continue
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passwd nis
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# Build group membership from both local file, and NIS.
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group local continue,merge
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group nis
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# Services comes from just the local file.
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services local
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protocols local
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# Hosts comes first from DNS, failing that, the local file
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hosts dns continue
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hosts local
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# Networks comes first from the local file, and failing
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# that the, irp daemon
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networks local continue
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networks irp
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netgroup local
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.Ed
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.Sh NOTES
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If a local user needs to be in the local host's
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.Dq wheel
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group but not in every host's
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.Dq wheel
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group, put them in the local host's
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.Pa /etc/group
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.Dq wheel
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entry and set up the
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.Dq groups
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portion of your
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.Pa /etc/irs.conf
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file as:
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.Bd -literal -offset indent
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group local continue,merge
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group nis
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.Ed
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.Pp
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NIS takes a long time to time out.
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Especially for hosts if you use the
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.Fl d
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option to your server's
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.Dq ypserv
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daemon.
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.Pp
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It is important that the
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.Pa irs.conf
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file contain an entry for each map.
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If a map is not mentioned in the
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.Pa irs.conf
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file, all queries to that map will fail.
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.Pp
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The classic NIS mechanism for specifying union namespaces is to add an entry
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to a local map file whose name is ``+''. In IRS, this is done via ``continue''
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and/or ``merge'' map options. While this results in a small incompatibility
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when local map files are imported from non-IRS systems to IRS systems, there
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are compensating advantages in security and configurability.
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.Sh FILES
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.Bl -tag -width /etc/irs.confXXXX -compact
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.It Pa /etc/irs.conf
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The file
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.Nm irs.conf
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resides in
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.Pa /etc .
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.El
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.Sh SEE ALSO
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.Xr groups 5 ,
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.Xr hosts 5 ,
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.Xr netgroup 5 ,
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.Xr networks 5 ,
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.Xr passwd 5 ,
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.Xr protocols 5 ,
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.Xr services 5
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