1998-11-13 00:53:01 +00:00
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.\" Copyright 1998 Juniper Networks, Inc.
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.\" 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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1999-08-28 00:22:10 +00:00
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.\" $FreeBSD$
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1998-11-13 00:53:01 +00:00
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.\"
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.Dd July 29, 1998
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.Dt RADIUS.CONF 5
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.Os FreeBSD
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.Sh NAME
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.Nm radius.conf
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.Nd RADIUS client configuration file
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.Sh SYNOPSIS
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.Pa /etc/radius.conf
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.Sh DESCRIPTION
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.Nm
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contains the information necessary to configure the RADIUS client
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library. It is parsed by
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.Xr rad_config 3 .
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The file contains one or more lines of text, each describing a
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single RADIUS server which will be used by the library. Leading
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white space is ignored, as are empty lines and lines containing
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only comments.
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.Pp
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A RADIUS server is described by two to four fields on a line. The
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fields are separated by white space. The
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.Ql #
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character at the beginning of a field begins a comment, which extends
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to the end of the line. A field may be enclosed in double quotes,
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in which case it may contain white space and/or begin with the
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.Ql #
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character. Within a quoted string, the double quote character can
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be represented by
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.Ql \e\&" ,
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and the backslash can be represented by
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.Ql \e\e .
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No other escape sequences are supported.
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.Pp
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The first field specifies
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the server host, either as a fully qualified domain name or as a
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dotted-quad IP address. The host may optionally be followed by a
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.Ql \&:
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and a numeric port number, without intervening white space. If the
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port specification is omitted, it defaults to the
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.Ql radius
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service in the
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.Pa /etc/services
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file, or to the standard RADIUS port 1812 if there is no such entry in
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.Pa /etc/services .
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.Pp
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The second field contains the shared secret, which should be known
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only to the client and server hosts. It is an arbitrary string of
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characters, though it must be enclosed in double quotes if it
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contains white space. The shared secret may be
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any length, but the RADIUS protocol uses only the first 128
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characters. N.B., some popular RADIUS servers have bugs which
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prevent them from working properly with secrets longer than 16
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characters.
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.Pp
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The third field contains a decimal integer specifying the timeout in
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seconds for receiving a valid reply from the server. If this field
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is omitted, it defaults to 3 seconds.
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.Pp
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The fourth field contains a decimal integer specifying the maximum
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number of attempts that will be made to authenticate with the server
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before giving up. If omitted, it defaults to 3 attempts. Note,
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this is the total number of attempts and not the number of retries.
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.Pp
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Up to 10 RADIUS servers may be specified. The servers are tried in
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round-robin fashion, until a valid response is received or the
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maximum number of tries has been reached for all servers.
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.Pp
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The standard location for this file is
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.Pa /etc/radius.conf .
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But an alternate pathname may be specified in the call to
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.Xr rad_config 3 .
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Since the file contains sensitive information in the form of the
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shared secrets, it should not be readable except by root.
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.Sh FILES
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.Pa /etc/radius.conf
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.Sh EXAMPLES
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.Bd -literal
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# A simple entry using all the defaults:
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radius1.domain.com OurLittleSecret
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# A server still using the obsolete RADIUS port, with increased
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# timeout and maximum tries:
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auth.domain.com:1645 "I can't see you, but I know you're there" 5 4
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# A server specified by its IP address:
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192.168.27.81 $X*#..38947ax-+=
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.Ed
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.Sh SEE ALSO
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.Xr libradius 3
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.Rs
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.%A C. Rigney, et al
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.%T Remote Authentication Dial In User Service (RADIUS)
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.%O RFC 2138
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.Re
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.Sh AUTHORS
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This documentation was written by
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.An John Polstra ,
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and donated to the FreeBSD project by Juniper Networks, Inc.
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