Introduction

Components involved

Installation

Replication of production setup

Here, we replicate the relevant parts of the present installation as a starting point.

Base virtual machine preparation

Imported Last School's Debian9 VM template "Debian9-base.ova" into Virtual Box as Debian9-base_8021x, re-initializing all MAC addresses. The description for this virtual machine template is:

Debian 9 amd64 installation
- Hostname:
debian9-base
- User accounts (username password):
ls last
root last
- Partitioning:
--- Physical:
------ 1GB RAID boot flag
------ 29GB RAID
--- RAID:
------ md0: ext3 /boot
------ md1: LVM - part of volume group debian9-base
--- LVM (VG/LV):
------ debian9-base/root: 18.6GB ext4 /
------ debian9-base/swap: 3.72GB swap area
- Up to date as of 2017-09-27
- sources.list includes:
Sections: main contrib non-free
Additional repository: backports
- Apt-cacher configured as per Last School site (Proxy credentials will need to be entered in /etc/apt/apt.conf.d/02proxy by user)
- SSH access installed and enabled

- Gnome and Firefox configured to auto-detect proxy settings
- Extra software installed:
vlc gimp emacs fonts-indic tcpdump iperf exfat-utils wireshark

- One network interface as bridged adapter, cable connected.


Added a second ethernet adapter in settings, connected to "Not attached", re-initialized its MAC address
Increased the allocated CPUs to 2

The network configuration is now as follows (interface name seen in guest OS - Adapter name in VirtualBox settings - Adapter "Attached to" setting in VirtualBox settings):

enp0s3 - Adapter 1 - Bridged adapter

enp0s8 - Adapter 2 - Not attached

Booted, logged in to GUI, connected DHCP

In terminal:

rm /etc/apt/apt.conf.d/02proxy
apt-get update
apt-get upgrade

Rebooted the virtual machine

Set strong passwords for ls and root users

Installed my ssh public key in root's .ssh/authorized_keys file.

 

Installation of relevant services:

Shorewall (based on LASTSCHL-207):

 

apt-get install shorewall
apt-get install ipset
mv /etc/shorewall{,-orig}
mkdir /etc/shorewall

Configuration:

root@debian9-base:/etc/shorewall# for i in `ls`; do echo "========= $i ========="; cat $i | grep -v "^#" | grep -v "^$"; echo "========= $i ========="; echo ""; done
========= hosts =========
========= hosts =========

========= interfaces =========
net     enp0s3         detect      tcpflags,dhcp,nosmurfs,routefilter,logmartians
wifi	enp0s8		   detect	   tcpflags,nosmurfs,routefilter,logmartians
========= interfaces =========

========= masq =========
enp0s3					   192.168.9.0/24
========= masq =========

========= policy =========
$FW		net		REJECT		INFO(uid)
$FW		wifi	ACCEPT		INFO(uid)
wifi	all		REJECT
net		all		DROP		INFO
all		all		REJECT		info
========= policy =========

========= routestopped =========
========= routestopped =========

========= rules =========
Invalid(DROP)		 net			 all
ACCEPT:INFO(uid)     net             $FW             tcp     22
ACCEPT:INFO(uid)     net             $FW             udp     123
ACCEPT:INFO(uid)     net	     	 $FW	     	 icmp
ACCEPT:INFO(uid)     $FW             net             tcp     465,587,995,993
ACCEPT:INFO(uid)     $FW             net             udp     53,123
ACCEPT:INFO(uid)     $FW	     	 net	     	 icmp
ACCEPT:INFO(uid)     $FW             net             tcp     -            -               -               -               root
ACCEPT:INFO(uid)     $FW             net             udp     -            -               -               -               root
ACCEPT:INFO(uid)     $FW             net             icmp    -            -               -               -               root
ACCEPT:INFO(uid)     $FW             net             tcp     -            -               -               -               _apt
ACCEPT:INFO(uid)     $FW             net             udp     -            -               -               -               _apt
ACCEPT:INFO(uid)     $FW             net             icmp    -            -               -               -               _apt
========= rules =========

========= shorewall.conf =========
....
STARTUP_ENABLED=Yes
....
IP_FORWARDING=On
....
========= shorewall.conf =========

========= zones =========
fw			firewall
net			ipv4
wifi		ipv4
========= zones =========

In /etc/default/shorewall, set

startup=1
root@debian9-base:~# cat /etc/rsyslog.d/40-shorewall.conf 
:msg, contains, "Shorewall:" /var/log/shorewall
& stop

root@debian9-base:~# cat /etc/logrotate.d/shorewall 
/var/log/shorewall-init.log {
    weekly
    rotate 108
    compress
    nomissingok
    create 0640 root adm
}

/var/log/shorewall
{
	rotate 731
	daily
	nomissingok
	notifempty
	delaycompress
	compress
	dateext
	postrotate
		reload rsyslog >/dev/null 2>&1 || true
        endscript
}
root@debian9-base:~# cat /etc/logrotate.d/rsyslog 
/var/log/syslog
/var/log/auth.log
{
	rotate 731
	daily
	dateext
	nomissingok
	notifempty
	delaycompress
	compress
	postrotate
		invoke-rc.d rsyslog rotate > /dev/null
	endscript
}

/var/log/mail.info
/var/log/mail.warn
/var/log/mail.err
/var/log/mail.log
/var/log/daemon.log
/var/log/kern.log
/var/log/user.log
/var/log/lpr.log
/var/log/cron.log
/var/log/debug
/var/log/messages
{
	rotate 4
	weekly
	missingok
	notifempty
	compress
	delaycompress
	sharedscripts
	postrotate
		invoke-rc.d rsyslog rotate > /dev/null
	endscript
}

root@debian9-base:~# cat /etc/logrotate.conf 
# see "man logrotate" for details
# rotate log files weekly
weekly

# keep 4 weeks worth of backlogs
rotate 4

# create new (empty) log files after rotating old ones
create

# uncomment this if you want your log files compressed
#compress

# packages drop log rotation information into this directory
include /etc/logrotate.d

# no packages own wtmp, or btmp -- we'll rotate them here
/var/log/wtmp {
    nomissingok
    monthly
    create 0664 root utmp
    rotate 24
}

/var/log/btmp {
    nomissingok
    monthly
    create 0660 root utmp
    rotate 24
}

# system-specific logs may be configured here
systemctl enable shorewall.service

 

Configure network and DHCP (based on LASTSCHL-212):

systemctl disable network-manager.service
systemctl disable NetworkManager.service
unlink /etc/resolv.conf
echo nameserver 192.168.10.1 > /etc/resolv.conf
mkdir /etc/ltsp
root@debian9-base:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The external interface
auto enp0s3
iface enp0s3 inet static
address 192.168.10.52
network 192.168.10.0
netmask 255.255.255.0
broadcast 192.168.10.255
gateway 192.168.10.1
  
# The wifi interface
auto enp0s8
iface enp0s8 inet static
address 192.168.9.1
netmask 255.255.255.0
broadcast 192.168.9.255
 
root@debian9-base:~# cat /etc/dhcp/dhcpd.conf | grep -v "^#" | grep -v "^$"
# Some of the following lines are there by default and are probably not required
ddns-update-style none;
option domain-name "example.org";
option domain-name-servers ns1.example.org, ns2.example.org;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
include "/etc/ltsp/dhcpd.conf";
 
root@debian9-base:~# cat /etc/ltsp/dhcpd.conf 
#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 192.168.9.0 netmask 255.255.255.0 {
    range 192.168.9.40 192.168.9.250;
    option domain-name "test.av";
    option domain-name-servers 192.168.9.1;
    option broadcast-address 192.168.9.255;
    option routers 192.168.9.1;
    option subnet-mask 255.255.255.0;
    option root-path "/opt/ltsp/amd64";
    if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
        filename "/ltsp/amd64/pxelinux.0";
    } else {
        filename "/ltsp/amd64/nbi.img";
    }

}
apt-get install isc-dhcp-server

In /etc/default/isc-dhcp-server, set:

INTERFACESv4="enp0s8"

 

 

Configure DNS (based on LASTSCHL-211):

apt-get install dnsmasq
touch /var/log/dnsmasq
chmod 640 /var/log/dnsmasq
root@debian9-base:~# cat /etc/dnsmasq.conf | grep -v "^#" | grep -v "^$"
strict-order
interface=enp0s8
expand-hosts
domain=test.av
log-queries
log-facility=/var/log/dnsmasq
 
root@debian9-base:~# cat /etc/logrotate.d/dnsmasq
/var/log/dnsmasq
{
	rotate 731
	daily
	nomissingok	
	notifempty
	delaycompress
	compress
	dateext
	postrotate
		reload rsyslog >/dev/null 2>&1 || true
	endscript
}
 
root@debian9-base:~# cat /etc/hostname
server.test.av
 
root@debian9-base:~# cat /etc/hosts
127.0.0.1	localhost

192.168.9.1	test.av
192.168.9.1	server.test.av	server

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

 

New stuff

Download the latest version of the attached shwl_add_shwl_del_sl_pmu archive and extract it somewhere convenient.

Shorewall

Add to /etc/shorewall/hosts:

wifi1 enp0s8:dynamic


Modify /etc/shorewall/policy:

# Just after: wifi		all		REJECT
# Added:
wifi1		net		ACCEPT		INFO
wifi1		$FW		ACCEPT		INFO(uid)
$FW		wifi1		ACCEPT		INFO(uid)
# Before: net		all		DROP		INFO


Add to /etc/shorewall/zones:

....
wifi1:wifi ipv4 dynamic_shared

In /etc/shorewall/shorewall.conf set:

SAVE_IPSETS=Yes

Add to /etc/shorewall/rules (replace IP addresses with actual IP address of wifi routers):

ACCEPT:INFO(uid)        wifi:192.168.9.2,192.168.9.3,192.168.9.4        $FW             udp    1812

 

FreeRADIUS

apt-get install freeradius
systemctl enable freeradius.service

 

Modify /etc/freeradius/3.0/mods-available/eap:

comment the following:

....
#       md5 {
#       }
....
#       leap {
#       }
....
#       gtc {
#               #  The default challenge, which many clients
#               #  ignore..
#               #challenge = "Password: "
#
#               #  The plain-text response which comes back
#               #  is put into a User-Password attribute,
#               #  and passed to another module for
#       	#  authentication.  This allows the EAP-GTC
#               #  response to be checked against plain-text,
#               #  or crypt'd passwords.
#               #
#               #  If you say "Local" instead of "PAP", then
#       	#  the module will look for a User-Password
#               #  configured for the request, and do the
#               #  authentication itself.
#               #
#               auth_type = PAP
#       }
....
#       tls {
#               # Point to the common TLS configuration
#               tls = tls-common
#
#       	#
#               # As part of checking a client certificate, the EAP-TLS
#               # sets some attributes such as TLS-Client-Cert-CN. This
#               # virtual server has access to these attributes, and can
#               # be used to accept or reject the request.
#       	#
#       #       virtual_server = check-eap-tls
#       }
....

modify the 'default_eap_type' directive under section 'eap' to be:

default_eap_type = peap

and the 'default_eap_type' directive under section 'ttls' to be:

default_eap_type = mschapv2

Modify /etc/freeradius/3.0/sites-available/default, comment the following lines:

# All the listen sections except the IPv4 version with "type = auth"
listen {
	ipaddr = *
	port = 0
	type = acct
	limit {
	}
}
listen {
	type = auth
	ipv6addr = ::	# any.  ::1 == localhost
	port = 0
	limit {
	      max_connections = 16
	      lifetime = 0
	      idle_timeout = 30
	}
}
listen {
	ipv6addr = ::
	port = 0
	type = acct
	limit {
	}
}
# In the authorize section:
chap
mschap
digest
files
-ldap
pap
# In the authenticate section:
Auth-Type PAP {
		pap
}
Auth-Type CHAP {
		chap
}
Auth-Type MS-CHAP {
		mschap
}
mschap
digest

Uncomment the following line in the 'authorize' section, and add it at the end of the 'post-auth' section:

auth_log

Add the following in the post-auth section, just before the Post-Auth-Type REJECT section:

update reply {
             Session-Timeout := 3600
             Termination-Action := 1
}

 

Modify /etc/freeradius/3.0/sites-available/inner-tunnel, comment the following lines:

# The whole listen section
listen {
       ipaddr = 127.0.0.1
       port = 18120
       type = auth
}
# In the authorize section:
chap
mschap
files
-ldap
# In the authenticate section:
Auth-Type PAP {
		pap
}
Auth-Type CHAP {
		chap
}
Auth-Type MS-CHAP {
		mschap
}

Add the following line after 'filter_username' and before 'suffix' in the 'authorize' section, and at the end of the 'post-auth' section:

auth_log

Modify /etc/freeradius/3.0/radiusd.conf, set (in the 'log' section):

auth = yes

 

Modify /etc/freeradius/3.0/clients.conf, comment the 'client localhost' and 'client localhost_ipv6' section and add (replace with actual IP addresses of wifi routers):

client wifi-ap1 {
       ipaddr = 192.168.9.2
       secret = password # Replace with an actual password
}
 
client wifi-ap2 {
       ipaddr = 192.168.9.3
       secret = password # Replace with an actual password
}

client wifi-ap3 {
       ipaddr = 192.168.9.4
       secret = password # Replace with an actual password
}

logrotate config '@@@'

Certificates

as freerad?

Modify /etc/freeradius/3.0/certs/server.cnf, set the following settings:

 

...
[ req ]
...
input_password	= password # Replace with an actual password
output_password	= password # Replace with an actual password
...

[certificate_authority]
countryName	= IN
stateOrProvinceName	= Tamil Nadu
localityName	= Auroville
organizationName	= Test
emailAddress	= admin@test.av
commonName	= "Test Certificate Authority"
...

Modify /etc/freeradius/3.0/certs/ca.cnf, set the following settings:

...
[ CA_default ]
...
crlDistributionPoints	= URI:http://server.test.av/test_ca.crl

[ req ]
...
input_password	= password # Replace with an actual password
output_password	= password # Replace with an actual password

[server]
countryName	= IN
stateOrProvinceName	= Tamil Nadu
localityName	= Auroville
organizationName	= Test
emailAddress	= admin@test.av
commonName	= "Test Server Certificate"
 
[v3_ca]
...
crlDistributionPoints	= URI:http://server.test.av/test_ca.crl
...

Modify /etc/freeradius/3.0/certs/client.cnf, set the following settings (although not technically necessary, but 'make' complained when tried without):

 

....
[ req ]
....
input_password          = password # Replace with an actual password, suggested different than above
output_password         = password # Replace with an actual password, suggested different than above
....
[client]
countryName             = IN
stateOrProvinceName     = Tamil Nadu
localityName            = Auroville
organizationName        = Test
emailAddress            = user@test.av
commonName              = user@test.av
....

 

 

 

as freerad ("@@@" right way to do it?):

cd /etc/freeradius/3.0/certs
make

Modify /etc/freeradius/3.0/mods-available/eap, modify the following directives under section 'tls-config tls-common' to be:

private_key_password = password # Replace password with the password chosen previously
private_key_file = /etc/freeradius/3.0/certs/server.pem
....
certificate_file = /etc/freeradius/3.0/certs/server.pem
....
ca_file = /etc/freeradius/3.0/certs/ca.pem

 

MySQL

apt-get install mysql-server freeradius-mysql
mysql -uroot
  CREATE DATABASE radius;
  exit
mysql -uroot radius < /etc/freeradius/3.0/mods-config/sql/main/mysql/schema.sql

Edit /etc/freeradius/3.0/mods-config/sql/main/mysql/setup.sql. Modify the following lines:

CREATE USER 'radius'@'localhost';
SET PASSWORD FOR 'radius'@'localhost' = PASSWORD('radpass');

to

CREATE USER 'freerad'@'localhost' IDENTIFIED VIA unix_socket;

and update the username 'radius' to be 'freerad' wherever else it is mentioned in the file.

mysql -uroot radius < /etc/freeradius/3.0/mods-config/sql/main/mysql/setup.sql
cd /etc/freeradius/3.0/mods-enabled
ln -s ../mods-available/sql sql

In /etc/freeradius/3.0/mods-enabled/sql, set the following options:

driver = "rlm_sql_mysql"
dialect = "mysql"
server = "localhost"
port = 3306
login = "freerad"
password = ""
radius_db = "radius"
logfile = ${logdir}/sqllog.sql # @@@ Do we need this?

Modify /etc/freeradius/3.0/sites-enabled/inner-tunnel, find the following line under authorize, post-auth and Post-Auth-Type REJECT sections

-sql

modify it to

sql

Modify /etc/freeradius/3.0/sites-enabled/default, find the following line under authorize, post-auth and Post-Auth-Type REJECT sections

-sql

In the post-auth and Post-Auth-Type REJECT sections, modify it to

sql

In the authorize section, comment it out.

Python module / script_launcher.py script

apt-get install libpython2.7-dev # It is not fully sure whether this package is needed
cd /etc/freeradius/3.0/mods-enabled
ln -s ../mods-available/python python

Put the following in it:

#
# Make sure the PYTHONPATH environmental variable contains the
# directory(s) for the modules listed below.
#
# Uncomment any func_* which are included in your module. If
# rlm_python is called for a section which does not have
# a function defined, it will return NOOP.
#
python {
	module = script_launcher

	python_path = ${modconfdir}/${.:name}:/usr/lib/python2.7
	
	mod_post_auth = ${.module}
	func_post_auth = post_auth
}

Modify /etc/freeradius/3.0/sites-enabled/inner-tunnel:

...
# Add this line just after 'sql' in the 'post-auth' section
python
...

Modify /etc/freeradius/3.0/mods-available/eap, modify the 'copy_request_to_tunnel' directive under both sections 'peap' and 'ttls' to be:

 

copy_request_to_tunnel = yes

Place the script_launcher.py script from the shwl_add_shwl_del_sl_pmu archive at /etc/freeradius/3.0/mods-config/python/script_launcher.py

chown freerad:freerad /etc/freeradius/3.0/mods-config/python/script_launcher.py
chmod 640 /etc/freeradius/3.0/mods-config/python/script_launcher.py

 

sudo

 

apt-get install sudo

Create /etc/sudoers.d/shwl_add_shwl_del_pmu, permissions 640 root:root, with:

freerad ALL=(root:root) NOPASSWD:/sbin/shorewall,/usr/bin/arp-scan

 

shwl_add / shwl_del scripts

 Prerequisites from above: sudo, FreeRADIUS python module / script_launcher.py script, shorewall, FreeRADIUS MySQL

apt-get install arp-scan
# Install the shwl_*.sh scripts from the shwl_add_shwl_del_sl_pmu archive in /usr/local/sbin/
chown root:freerad /usr/local/sbin/shwl_*
chmod 750 /usr/local/sbin/shwl_*
mkdir /var/local/shwl_add
chown freerad:freerad /var/local/shwl_add
chmod 700 /var/local/shwl_add
chmod a-s /var/local/shwl_add

Add the following line to freerad's crontab

*/1 * * * * /usr/local/sbin/shwl_del.sh # @@@ figure out optimal interval

Settings in /usr/local/sbin/shwl_add.sh (at top of file):

....
# Settings
cfg_shwl_zone="wifi1" # Shorewall dynamic zone to which client devices' IP addresses need to be added # @@@ figure out a few optimal intervals
cfg_shwl_retry_delay=2 # Number of seconds to wait, in case of failure in adding IP to shorewall dynamic zone, before attempting second time
cfg_file_location="/var/local/shwl_add" # Folder where runtime information will be stored
cfg_file_location_owner_user="freerad" # User by which above folder should be owned
cfg_file_location_owner_group="freerad" # Group by which above folder should be owned
cfg_ip_srch_iface="enp0s8" # Network interface on which to scan for devices
cfg_ip_srch_initial_delay=0.75 # How many seconds to wait before first attempt at scanning
cfg_ip_srch_retry_delay=4 # How many seconds to wait in between further attempts at scanning
cfg_ip_srch_max_attempts=50 # Maximum number of attempts at scanning before giving up
cfg_mysql_user="freerad" # MySQL username
cfg_mysql_db="shwl_add_shwl_del_pmu" # MySQL database name where to log events
cfg_mysql_log_table="event_log" # Table in MySQL database where to log events
....

Settings in /usr/local/sbin/shwl_del.sh (at top of file):

....
# Settings
cfg_ip_match_pattern="192.168." # Pattern to match all IP addresses that might be in the shorewall dynamic zone # @@@ figure out a few optimal intervals
cfg_session_expiry_timeout=3660 # Session duration (should be slightly longer than Session-Timeout attribute specified in FreeRADIUS)
cfg_shwl_zone="wifi1" # Shorewall dynamic zone containing clients' IP addresses
cfg_file_location="/var/local/shwl_add" # Folder where runtime information is stored
cfg_file_location_owner_user="freerad" # User by which above folder should be owned
cfg_file_location_owner_group="freerad" # Group by which above folder should be owned
cfg_mysql_user="freerad" # MySQL username
cfg_mysql_db="shwl_add_shwl_del_pmu" # MySQL database name where to log events
cfg_mysql_log_table="event_log" # Table in MySQL database where to log events
....

 

MySQL

 

mysql -uroot
  CREATE DATABASE shwl_add_shwl_del_pmu;
  GRANT ALL on shwl_add_shwl_del_pmu.event_log TO 'freerad'@'localhost';
  exit
mysql -uroot shwl_add_shwl_del_pmu < shwl_add_shwl_del_pmu.sql # Updating shwl_add_shwl_del_pmu.sql to the full path of the shwl_add_shwl_del_pmu.sql file extracted from the shwl_add_shwl_del_sl_pmu archive

 

 

pam_to_mysql_update.sh script

Prerequisities from above: sudo, FreeRADIUS MySQL, shwl_add / shwl_del scripts MySQL


apt-get install libpam-script sshpass
mkdir /usr/share/libpam-script/pam-script.d/pam_to_mysql_update
cd /usr/share/libpam-script/pam-script.d/pam_to_mysql_update
# Install the pam_to_mysql_update.sh script from the shwl_add_shwl_del_sl_pmu archive in here
ln -s pam_to_mysql_update.sh pam_script_auth
ln -s pam_to_mysql_update.sh pam_script_passwd
mysql -uroot
	GRANT ALL on radius.radcheck TO 'freerad'@'localhost';
exit
pam-auth-update # And, uncheck the box for "Support for authentication by external scripts"

Add the following line at the end of /etc/pam.d/common-auth:

....
auth	required                        pam_script.so onerr=fail dir=/usr/share/libpam-script/pam-script.d/pam_to_mysql_update/

Add the following line at the end of /etc/pam.d/common-password:

....
password	required                        pam_script.so onerr=fail dir=/usr/share/libpam-script/pam-script.d/pam_to_mysql_update/

Settings in /usr/share/libpam-script/pam-script.d/pam_to_mysql_update/pam_to_mysql_update.sh (at top of file):

....
# Settings
cfg_mysql_user="freerad" # MySQL username
cfg_mysql_user_db="radius" # MySQL database name where to update passwords
cfg_mysql_log_db="shwl_add_shwl_del_pmu" # MySQL database name where to log events
cfg_mysql_user_table="radcheck" # Table in MySQL database where to update passwords
cfg_mysql_log_table="event_log" # Table in MySQL database where to log events
cfg_verbose=0 # Print verbose messages on stdout
....

 

Managing users

Adding users

Replace 'user' with the desired username.

mysql -uroot
	use radius;
	INSERT INTO radcheck VALUES ('','user','NT-Password',':=','');
exit
adduser user # When prompted for "Current password:", ignore and press enter

Changing password

It is sufficient to use standard utilities such as 'passwd', the password will be updated in the MySQL database as well. Tested with 'passwd' and User Accounts applet in GNOME. In case prompted with "Current password:" (exactly as written here) it is sufficient to ignore and press enter.

Deleting users

Replace 'user' with the desired username.

mysql -uroot
	use radius;
	DELETE FROM radcheck WHERE username='user';
exit
deluser user


WiFi router (NAS) configuration

TP-Link Archer C20 v4 00000004

TP-Link TD-W8968 V4 0x00000001

TP-Link TL-WR740N v4 00000000

Supplicant configuration

Linux

Android

Windows 10

Mac OS

iPhone

Sources

https://wiki.freeradius.org/guide/Basic-configuration-HOWTO

https://wiki.freeradius.org/guide/SQL-HOWTO-for-freeradius-3.x-on-Debian-Ubuntu

https://wiki.freeradius.org/modules/Rlm_python

https://wiki.freeradius.org/config/Certificates

http://deployingradius.com/documents/configuration/certificates.html

http://deployingradius.com/documents/protocols/compatibility.html