Skip to content
Fetching contributors…
Cannot retrieve contributors at this time
259 lines (182 sloc) 9.79 KB
All code in this server was written for this project.
The server is mostly compatible with livingston radiusd-2.01
(no menus or s/key support though) but with more features, such as:
o Can limit the maximum number of simultaneous logins on a per-user basis!
o Multiple DEFAULT entries, that can optionally fall-through.
o In fact, every entry can fall-through
o Deny/permit access based on huntgroup users dials into
o Set certain parameters (such as static IP address) based on huntgroup
o Extra "hints" file that can select SLIP/PPP/rlogin based on
username pattern (Puser or user.ppp is PPP, plain "user" is rlogin etc).
o Can execute an external program when user has authenticated (for example
to run a sendmail queue).
o Can use `$INCLUDE filename' in radiusd.conf, users, and dictionary files
o Can act as a proxy server, relaying requests to a remote server
o Supports Vendor-Specific attributes
o Supports many different plug-in modules for authentication,
authorization, and accounting.
o No good documentation at all, just like the original radiusd 1.16!
Work on real manual pages is progressing slowly. For a large part you
can use the documentation of the Livingston 2.01 server. Just remember
that using Prefix and Suffix in both the "users" and the (FreeRadius
specific) "hints" file will give unpredictable results. Well actually
it will result in Prefix and Suffix probably not working in the "users"
file if you already stripped them off in the "hints" file.
See the INSTALL file, in the parent directory.
For every file there is a fully commented example file included, that
explains what is does, and how to use it. Read those sample files too!
Again, many of the configuration files are ONLY documented in the
comments included in the files. Reading the configuration files is
REQUIRED to fully understand how to create complex configurations of
the server.
Make sure the clients (portmasters, Linux with portslave etc) are set up to
use the host radiusd is running on as authentication and accounting host.
Configure these clients to use a "radius secret password". For every client,
also enter this "secret password" into the file /etc/raddb/clients.
See also the manual page for clients(5).
Every NAS (Network Access Server, also known as terminal server) should have
an entry in this file with an abbreviated name and the type of NAS it
is. Currently FreeRadius supports the following NAS types:
Terminal Server Type in naslist
3Com/USR Hiper Arc Total Control usrhiper
3Com/USR NetServer netserver
3Com/USR TotalControl tc
Ascend Max 4000 family max40xx
Cisco Access Server family cisco
Cistron PortSlave portslave
Computone PowerRack computone
Cyclades PathRAS pathras
Livingston PortMaster livingston
Multitech CommPlete Server multitech
Patton 2800 family patton
Usually this is the same list as in the "clients" file, but not every
NAS is a client and not every client is a NAS (this will start to make
sense if you use radius proxy servers).
If ``checkrad'' needs to login on your terminal server to check who
is online on a certain port (i.e. it's not possible to use SNMP or
finger) you need to define a loginname and password here.
This is normally ONLY needed for USR/3Com Total Control, NetServer and
Cyclades PathRAS terminal servers!
Customize the /etc/raddb/hints file. This file is used to give users a
different login type based on a prefix/suffix of their loginname. For
example, logging in as "user" may result in a rlogin session to a Unix
system, and logging in as "Puser" could start a PPP session.
This is the /etc/raddb/huntgroups file. Here you can define different
huntgroups. These can be used to:
- restrict access to certain huntgroups to certain users/groups of
users (define this in the huntgroups file itself)
- match a loginname with a huntgroup in /etc/raddb/users. One use
for this is to give a user a static IP address based on the
huntgroup / Point of Presence (s)he dials in to.
With the original RADIUS server, every user had to be defined in this
file. There could be one default entry, where you could for example
define that a user not in the radius file would be checked agains the
UNIX password file and on successful login would get a PPP connection.
In the new style file, you can define multiple DEFAULT entries. All
entries are processed in the order as they appear in the users file.
If an entry matches the username, radiusd will stop scanning the users
file unless the attribute "Fall-Through = Yes" is set.
You can uses spaces in usernames by escaping them with \ or by using
quotes. For example, "joe user" or joe\ user.
The FreeRadius server does not trim any spaces from a username received
from the portmaster (livingston does, in perl notation, $user =~ s/\s+.*//;)
3g. NEW RADIUS ATTRIBUTES (to be used in the USERS file).
Name Type Descr.
---- ---- ------
Simultaneous-Use integer Max. number of concurrent logins
Fall-Through integer Yes/No
Login-Time string Defines when user may login.
Current-Time string Allows you to perform time-based
checks when a request is received.
Login-Time defines the time span a user may login to the system. The
format of a so-called time string is like the format used by UUCP.
A time string may be a list of simple time strings separated by "|" or ",".
Each simple time string must begin with a day definition. That can be just
one day, multiple days, or a range of days separated by a hyphen. A
day is Mo, Tu, We, Th, Fr, Sa or Su, or Wk for Mo-Fr. "Any" or "Al"
means all days.
After that a range of hours follows in hhmm-hhmm format.
For example, "Wk2305-0855,Sa,Su2305-1655".
Radiusd calculates the number of seconds left in the time span, and
sets the Session-Timeout to that number of seconds. So if someones
Login-Time is "Al0800-1800" and she logs in at 17:30, Session-Timeout
is set to 1800 seconds so that she is kicked off at 18:00.
4a. /var/log/radutmp
In this file the currently logged in users are held. The program "radwho"
reads this file and gives you a summary. Rogue sessions can be deleted
from this file with the "radzap" program.
4b. /var/log/radwtmp
This file is "wtmp" compatible and keeps a history of all radius logins/
logouts. This file can be read with the "last" program, and other Unix
accounting programs (such as "ac" and "sac") can be used to produce a
4c. /var/log/radius.log
All RADIUS informational. diagnostic and error messages are logged in
this file. If radiusd has been started with the "-y" flag, all logins
attempts will be logged in this file. For failed logins, the wrong password
will also be logged. With the "-z" flag, the passwords for successful
logins will be logged as well. That's pretty dangerous though in case
anyone unpriviliged ever manages to get access to this file!
4d. /var/log/radacct/<terminal_server>/detail
This is the original radius logfile, as written by all the livingston
radius servers. It's only created if the directory /var/log/radacct exists.
The <terminal_server> name is the short name if one is defined in
For more configuration options on the detail file please see
README.rlm_detail as it expands upon this greatly.
We know that the documentation provided is sparse. However it is not in
the scope of the radius server to provide a guide as to how terminal
servers works and how the RADIUS protocol works and is used.
The latest version of FreeRadius is always available through
anonymous CVS from - for more info, see
There are two GNU Mailman mailing lists hosted by Cistron Internet Services:
a 'users' list, at:
and a 'developers only' list, at
The files in other directories are:
debian/ Files to build a "freeradius" Debian Linux package.
dialup_admin/ A PHP web front-end to manage an SQL database associated
with the server.
doc/ Various snippets of documentation
doc/rfc/ Copies of the RFC's. If you have Perl, do a 'make' in
that directory, and look at the HTML output.
libltdl/ Libtool platform independent library system.
man/ Unix Manual pages for the server, configuration files,
and associated utilities.
mibs/ SNMP Mibs for the server.
raddb/ Sample configuration files for the server.
redhat/ Additional files for a RedHat Linux system.
scripts/ Sample scripts for startup and maintenance.
src/ Source code
src/main source code for the daemon and associated utilities
src/lib source code for the RADIUS library
src/include header files
src/modules dynamic plug-in modules
src/billing Some scripts and configuration files to assist in billing,
Currently mostly VoIP related.
suse/ Aditional files for a SuSE (UnitedLinux) system.
todo/ TODO list and assorted files.
If you have ANY problems, concerns, or surprises when running the
server, then run it in debugging mode, as root, from the command line:
$ radiusd -X
It will produce a large number of messages. The answers to many
questions, and the solution to many problems, can usually be found in
these messages.
For further details, see:
and the 'bugs' file, in this directory.
Jump to Line
Something went wrong with that request. Please try again.