.\" Copyright (c) 2001 Giorgos Keramidas <keramida@freebsd.org>
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" $FreeBSD: src/share/man/man5/host.conf.5,v 1.1.2.2 2002/02/12 10:12:13 ru Exp $
.\" $DragonFly: src/share/man/man5/host.conf.5,v 1.2 2003/06/17 04:37:00 dillon Exp $
.\"
.\" Note: The date here should be updated whenever a non-trivial
.\" change is made to the manual page.
.Dd December 6, 2001
.Dt HOST.CONF 5
.Os
.Sh NAME
.Nm host.conf
.Nd resolver services configuration file
.Sh SYNOPSIS
.Pa /etc/host.conf
.Sh DESCRIPTION
The
.Nm
file holds part of the configuration for the resolver of
.Fx .
It describes what services (eg. DNS or
.Xr yp 8 )
the C library resolving routines
(like
.Xr gethostbyname 3 )
will use, and their order of use, when resolving host names or addresses.
.Pp
The format of this file is human readable, and easy to modify with the
text editor of your choise.
Lines with
.Ql #
in the first column are comments and are ignored.
The rest of the lines may contain any number of service names,
separated by any number of colons
.Pq Ql \&: ,
semicolons
.Pq Ql \&; ,
commas
.Pq Ql \&, ,
or whitespace (tab, space and newline characters).
.Ss Valid Service Names
Service names that are recognized as valid in
.Nm
are:
.Bl -tag -width ".Li yellowpages"
.It Li /etc/hosts
An alias for
.Ql hosts .
.It Li bind
This service makes the resolver use Internet Domain System (DNS) for
resolving hostnames and addresses.
The DNS resolver configuration is
described in
.Xr resolver 5 .
.It Li dns
An alias for
.Ql bind .
.It Li domain
An alias for
.Ql bind .
.It Li hosts
When this service name is used in
.Nm ,
name and address lookups are done by using the local hosts database.
The local hosts database is described in
.Xr hosts 5 .
.It Li hosttable
An alias for
.Ql hosts .
.It Li htable
An alias for
.Ql hosts .
.It Li nis
When service name is used in
.Nm ,
the resolver uses YP/NIS for making lookups of hostnames and
addresses.
The YP/NIS system is described in
.Xr yp 8 .
.It Li yellowpages
An alias for
.Ql nis .
.It Li yp
An alias for
.Ql nis .
.El
.Sh FILES
.Bl -tag -width ".Pa host.conf"
.It Pa host.conf
The services configuration file resides in
.Pa /etc .
.El
.Sh SEE ALSO
.Xr gethostbyname 3 ,
.Xr hosts 5 ,
.Xr resolver 5 ,
.Xr yp 8