.\" Copyright 1998 Juniper Networks, Inc. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD$ .\" .Dd October 30, 1999 .Dt RADIUS.CONF 5 .Os FreeBSD .Sh NAME .Nm radius.conf .Nd RADIUS client configuration file .Sh SYNOPSIS .Pa /etc/radius.conf .Sh DESCRIPTION .Nm contains the information necessary to configure the RADIUS client library. It is parsed by .Xr rad_config 3 . The file contains one or more lines of text, each describing a single RADIUS server which will be used by the library. Leading white space is ignored, as are empty lines and lines containing only comments. .Pp A RADIUS server is described by three to five fields on a line: .Pp .Bl -item -offset indent -compact .It Service type .It Server host .It Shared secret .It Timeout .It Retries .El .Pp The fields are separated by white space. The .Ql # character at the beginning of a field begins a comment, which extends to the end of the line. A field may be enclosed in double quotes, in which case it may contain white space and/or begin with the .Ql # character. Within a quoted string, the double quote character can be represented by .Ql \e\&" , and the backslash can be represented by .Ql \e\e . No other escape sequences are supported. .Pp .Pp The first field gives the service type, either .Ql auth for RADIUS authentication or .Ql acct for RADIUS accounting. If a single server provides both services, two lines are required in the file. Earlier versions of this file did not include a service type. For backward compatibility, if the first field is not .Ql auth or .Ql acct the library behaves as if .Ql auth were specified, and interprets the fields in the line as if they were fields two through five. .Pp The second field specifies the server host, either as a fully qualified domain name or as a dotted-quad IP address. The host may optionally be followed by a .Ql \&: and a numeric port number, without intervening white space. If the port specification is omitted, it defaults to the .Ql radius or .Ql radacct service in the .Pa /etc/services file for service types .Ql auth and .Ql acct , respectively. If no such entry is present, the standard ports 1812 and 1813 are used. .Pp The third field contains the shared secret, which should be known only to the client and server hosts. It is an arbitrary string of characters, though it must be enclosed in double quotes if it contains white space. The shared secret may be any length, but the RADIUS protocol uses only the first 128 characters. N.B., some popular RADIUS servers have bugs which prevent them from working properly with secrets longer than 16 characters. .Pp The fourth field contains a decimal integer specifying the timeout in seconds for receiving a valid reply from the server. If this field is omitted, it defaults to 3 seconds. .Pp The fifth field contains a decimal integer specifying the maximum number of attempts that will be made to authenticate with the server before giving up. If omitted, it defaults to 3 attempts. Note, this is the total number of attempts and not the number of retries. .Pp Up to 10 RADIUS servers may be specified for each service type. The servers are tried in round-robin fashion, until a valid response is received or the maximum number of tries has been reached for all servers. .Pp The standard location for this file is .Pa /etc/radius.conf . But an alternate pathname may be specified in the call to .Xr rad_config 3 . Since the file contains sensitive information in the form of the shared secrets, it should not be readable except by root. .Sh FILES .Pa /etc/radius.conf .Sh EXAMPLES .Bd -literal # A simple entry using all the defaults: acct radius1.domain.com OurLittleSecret # A server still using the obsolete RADIUS port, with increased # timeout and maximum tries: auth auth.domain.com:1645 "I can't see you" 5 4 # A server specified by its IP address: auth 192.168.27.81 $X*#..38947ax-+= .Ed .Sh SEE ALSO .Xr libradius 3 .Rs .%A C. Rigney, et al .%T Remote Authentication Dial In User Service (RADIUS) .%O RFC 2138 .Re .Rs .%A C. Rigney .%T RADIUS Accounting .%O RFC 2139 .Re .Sh AUTHORS This documentation was written by .An John Polstra , and donated to the .Fx project by Juniper Networks, Inc.