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<head>
<title>
Radiusclient - Installation and Operation Guide
</title>
</head>
<body>
<h1>
<center>
<i>
Radiusclient - Installation and Operation Guide
</i>
</center>
</h1>
<hr size=8>
<!--------------------------------------------------------------------------->
<h2>
Table of contents
</h2>
<ul>
<li><a href="#introduction">Introduction</a>
<li><a href="#principles">Principles of operation</a>
<li><a href="#installation">Installation</a>
<li><a href="#availability">Availabiliy</a>
<li><a href="#credits">Credits</a>
<li><a href="#copyright">Copyright</a>
<li><a href="#contacting">Contacting the author</a>
<li><a href="#appendixa">Appendix A: Command line flags</a>
</ul>
<!--------------------------------------------------------------------------->
<h2>
<a name="introduction">
Introduction
</a>
</h2>
Radiusclient is a /bin/login replacement which gets called by a
getty to log in a user and to setup the user's login environment.
<br>
Normal login programs just check the login name and password which the
user entered against the local password file (/etc/passwd, /etc/shadow).
In contrast to that Radiusclient also uses the RADIUS protocol to
authenticate the user.
<p>
RADIUS stands for <i>R</i>emote <i>A</i>uthentication <i>D</i>ial
<i>In</i> <i>U</i>ser <i>S</i>ervice and is a protocol for carrying
authentication, authorization, and configuration information between
a Network Access Server (NAS) which desires to authenticate its
links and a shared Authentication Server.<br> The protocol
originally was designed by the well known terminal server
manufacturer Livingston for use with their Portmaster series of
terminal servers. Since then it has been implemented by a lot of
other vendors and it is also on it's way to become a Internet
Standard.
<!--------------------------------------------------------------------------->
<h2>
<a name="principles">
Principles of operation
</a>
</h2>
If the main program of Radiusclient which is called <i>radlogin</i> gets
invoked by your systems's getty, it behaves like the normal login
program to the user.
<p>
First it asks the user for his loginname (if not supplied by getty)
and his password.
<p>
Then it tries to find the login name either through a RADIUS server
query or in the local passwd file or through both methods.
<p>
If the user is authenticated locally <i>radlogin</i> calls the local login
program to spawn a login enviroment.
<p>
If the user is authenticated via RADIUS <i>radlogin</i> calls a special other
login program which gets the information that was passed from the RADIUS
server in enviroment variables.
<p>
In this special login program you can now either start a telnet/rlogin
session or start up SLIP/CSLIP or even PPP based on the information from
the RADIUS server. Furthermore you can send accounting information to a
RADIUS accouting server via a program called radacct which is also
part of Radiusclient.
<!--------------------------------------------------------------------------->
<h2>
<a name="installation">
Installation
</a>
</h2>
Get the Radiusclient package from the places mentioned
<a href="#availability">below</a>.
<p>
Then unpack it in a directory which you normally use for keeping your
source code. For example do:
<p>
<pre>
cd /usr/src
gzip -dc radiusclient-x.x.tar.gz | tar xvvf -
</pre>
<p>
You now should have a directory called radiusclient-x.x in which all the
source code of Radiusclient is stored.
<p>
First run configure --help to see if you need to enable any options.
Then configure the sources by calling configure with the
appropriate options.
<p>
Have a look at include/messages.h if you'd like to change some
of the messages there. But normally you shouldn't.
<p>
Executing "make" builds the executables.
<p>
Executing "make install" will install the executables and example
versions of all the needed config and data files. Be careful
the installation process will <b>overwrite</b> existing files
without asking you.
Try "make -n install" to see which file gets were if you're
unsure.
<p>
The installation procedure will only install a dummy login.radius
script which just outputs all RADIUS_* environment variables and
then exits.
<p>
You need to write your own login.radius if you want that the script
does something useful. See the login.radius directory for example
scripts.
<p>
You <b>will</b> have to look into radiusclient.conf and edit it.
<p>
Add the following two line to /etc/services if you don't
already have them:
<p>
<pre>
radius 1645/udp # RADIUS access requests
radacct 1646/udp # RADIUS accounting requests
</pre>
<p>
Get your getty to execute <i>radlogin</i> instead of the normal login
process. The method of how to do this varies from getty to getty.
<p>
<ul>
<li>If you're using getty_ps you can set the LOGIN directive in the
respective config file.
<p>
<li>agetty has a command line option (-l) which allows
you to specify an alternate login program, i.e. <i>radlogin</i>.
<p>
<li>With mgetty you add the following line to your login.cfg file:
<p>
<pre>
* - - <path>/radlogin @
</pre>
</ul>
I suggest you use mgetty or getty_ps, mgetty even has a nice
automatic PPP detection feature, which can be useful.
<!--------------------------------------------------------------------------->
<h2>
<a name="availability">
Availability
</a>
</h2>
This program is avaiable from <a href="ftp://ftp.cityline.net/pub/radiusclient/">
ftp.cityline.net</a> in the directory
<a href="ftp://ftp.cityline.net/pub/radiusclient/">/pub/radiusclient</a>.
<br>
Download the version with the largest version number, older version are
only kept for reference.
<!--------------------------------------------------------------------------->
<h2>
<a name="credits">
Credits
</a>
</h2>
My thanks go to all the people who have helped me in one or another
way with the development of radiusclient but especially to:
<p>
<center>
<table cellpadding=0 cellspacing=0 width="90%" border=0>
<tr>
<td>
<a href="mailto:map@iphil.net">
Miguel A.L. Paraz <map@iphil.net>
</a>
</td>
</tr>
<tr>
<td>
<a href="mailto:gody@master.slon.net">
Matjaz Godec <gody@master.slon.net>
</a>
</td>
</tr>
<tr>
<td>
<a href="mailto:mla@gams.co.at">
Michael Lausch <mla@gams.co.at>
</a>
</td>
</tr>
</table>
</center>
<!--------------------------------------------------------------------------->
<h2>
<a name="copyright">
Copyright
</a>
</h2>
Read the file COPYRIGHT in the top directory of Radiusclient for the
respective copyrights.
<p>
If you like the Radiusclient software very much and/or are using
it on a production machine please send my a postcard. My postal
address is:
<p>
<center>
<table cellpadding=0 cellspacing=0 width="90%" border=0>
<tr>
<td>
Lars Fenneberg<br>
Boettgerstrasse 29<br>
22851 Norderstedt<br>
Germany<br>
</td>
</tr>
</table>
</center>
<!--------------------------------------------------------------------------->
<h2>
<a name="contacting">
Contacting the author
</a>
</h2>
Send your comments, suggestions, bug reports and patches to
<a href="mailto:lf@elemental.net">
Lars Fenneberg <nobr><lf@elemental.net></nobr></a>.
<!--------------------------------------------------------------------------->
<h2>
<a name="appendixa">
Appendix A: Command line flags
</a>
</h2>
<center>
<table cellpadding=0 cellspacing=10 width="95%" border=0>
<tr>
<td>
<table border=2 width=100%>
<tr>
<th colspan=2>
radlogin
</th>
</tr>
<tr>
<td>
-f
</td>
<td>
Path to an alternative configuration file
</td>
</tr>
<tr>
<td>
-i
</td>
<td>
File name of the terminal used to determine what to send in
the NAS-Port attribute. Normally the tty of stdin is used.
</td>
</tr>
<tr>
<td>
-n
</td>
<td>
Disable display if the radlogin issue file. This option is set
by default if radlogin is called with an argument.
</td>
</tr>
<tr>
<td>
-V
</td>
<td>
Display version information
</td>
</tr>
<tr>
<td>
-h
</td>
<td>
Display usage information
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table border=2 width=100%>
<tr>
<th colspan=2>
radacct
</th>
</tr>
<tr>
<td>
-i
</td>
<td>
File name of the terminal used to determine what to send in
the NAS-Port attribute. Normally the tty of stdout is used.
</td>
</tr>
<tr>
<td>
-V
</td>
<td>
Display version information
</td>
</tr>
<tr>
<td>
-h
</td>
<td>
Display usage information
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table border=2 width=100%>
<tr>
<th colspan=2>
radstatus
</th>
</tr>
<tr>
<td>
-V
</td>
<td>
Display version information
</td>
</tr>
<tr>
<td>
-h
</td>
<td>
Display usage information
</td>
</tr>
</table>
</td>
</tr>
</table>
</center>
<p>
<hr size=16>
<br>
Last changed: 7/19/98<br>
Copyright © 1996,1997,1998, Lars Fenneberg, lf@elemental.net<br>
</body>
</html>
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