Freeradius ldap

groupofNames

# switch, groups, xinux.net
dn: cn=switch,ou=groups,dc=xinux,dc=net
objectClass: groupOfNames
cn: switch
description: Switch Admins
member: cn=thomas will,ou=users,dc=xinux,dc=net

clients.conf

• cat /etc/freeradius/clients.conf

client localhost {
ipaddr = 127.0.0.1
secret = sysadm
nastype     = other
}
client 192.168.0.0/16 {
 secret = sysadm
nastype = other
}
client 172.16.0.0/12 {
secret = sysadm
nastype = other
}
client 10.0.0.0/8 {
secret = sysadm
nastype = other
}

radiusd.conf

• cat /etc/freeradius/radiusd.conf

prefix = /usr
exec_prefix = /usr
sysconfdir = /etc
localstatedir = /var
sbindir = ${exec_prefix}/sbin
logdir = /var/log/freeradius
raddbdir = /etc/freeradius
radacctdir = ${logdir}/radacct
name = freeradius
confdir = ${raddbdir}
run_dir = ${localstatedir}/run/${name}
db_dir = ${raddbdir}
libdir = /usr/lib/freeradius
pidfile = ${run_dir}/${name}.pid
user = freerad
group = freerad
max_request_time = 30
cleanup_delay = 5
max_requests = 1024
listen {
type = auth
ipaddr = *
port = 0
}
listen {
ipaddr = *
port = 0
type = acct
}
hostname_lookups = no
allow_core_dumps = no
regular_expressions    = yes
extended_expressions    = yes
log {
destination = files
file = ${logdir}/radius.log
syslog_facility = daemon
stripped_names = no
auth = no
auth_badpass = no
auth_goodpass = no
}
checkrad = ${sbindir}/checkrad
security {
max_attributes = 200
reject_delay = 1
status_server = yes
}
proxy_requests  = yes
$INCLUDE proxy.conf
$INCLUDE clients.conf
thread pool {
start_servers = 5
max_servers = 32
min_spare_servers = 3
max_spare_servers = 10
max_requests_per_server = 0
}
modules {
$INCLUDE ${confdir}/modules/
}
instantiate {
exec
expr
expiration
logintime
}
$INCLUDE policy.conf
$INCLUDE sites-enabled/

ldap

• cat /etc/freeradius/modules/ldap

ldap {
        server = "localhost"
        identity = "cn=admin,dc=xinux,dc=net"
        password = sysadm
        basedn = "dc=xinux,dc=net"
        filter = "(uid=%{%{Stripped-User-Name}:-%{User-Name}})"
        ldap_connections_number = 5
        max_uses = 0
        timeout = 4
        timelimit = 3
        net_timeout = 1
        dictionary_mapping = ${confdir}/ldap.attrmap
        edir_account_policy_check = no
        groupname_attribute = cn
        groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=%{control:Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{control:Ldap-UserDn})))"
        groupmembership_attribute = radiusGroupName
        keepalive {
                idle = 60
                probes = 3
                interval = 3
        }
}

default

cat /etc/freeradius/sites-enabled/default
authorize {
ldap
}
authenticate {
Auth-Type LDAP {
ldap
}
}
preacct {
}
accounting {
}
session {
radutmp
}
post-auth {
exec
Post-Auth-Type REJECT {
attr_filter.access_reject
}
}
pre-proxy {
}
post-proxy {
}

inner-tunnel

server inner-tunnel {
authorize {
ldap
}
authenticate {
Auth-Type LDAP {
ldap
}
}
session {
radutmp
}
post-auth {
Post-Auth-Type REJECT {
attr_filter.access_reject
}
}
pre-proxy {
}
post-proxy {
}
}

test

console 1

• freeradius -X

...
 Module: Checking post-auth {...} for more modules to load
 } # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
	type = "auth"
	ipaddr = *
	port = 0
}
listen {
	type = "acct"
	ipaddr = *
	port = 0
}
 ... adding new socket proxy address * port 40079
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on proxy address * port 1814
Ready to process requests.

console 2

postiv

• radtest badura.vonodinsraben suxer localhost 1812 secretkey

Sending Access-Request of id 52 to 127.0.0.1 port 1812
	User-Name = "badura.vonodinsraben"
	User-Password = "suxer"
	NAS-IP-Address = 192.168.244.153
	NAS-Port = 1812
	Message-Authenticator = 0x00000000000000000000000000000000
rad_recv: Access-Accept packet from host 127.0.0.1 port 1812, id=52, length=20

negativ

• radtest badura.vonodinsraben falsch localhost 1812 secretkey

Sending Access-Request of id 218 to 127.0.0.1 port 1812
	User-Name = "badura.vonodinsraben"
	User-Password = "falsch"
	NAS-IP-Address = 192.168.244.153
	NAS-Port = 1812
	Message-Authenticator = 0x00000000000000000000000000000000
rad_recv: Access-Reject packet from host 127.0.0.1 port 1812, id=218, length=20

• https://medium.com/@georgijsr/freeradius-2-1-12-ubuntu-14-04-server-with-ldap-authentication-and-ldap-fail-over-6611624ff2c9