Authentification Problem with Cisco AP, freeradius and LDAP
Florian Arenz
arenz.florian at gmail.com
Thu Oct 11 09:40:38 CEST 2012
Hello,
i have got a realy annoing authentification problem and i would be glad if
you could help me.
I use a Cisco Aironet 1130ag Access Point, the radius-server is a Debian
Squeeze (6.0.5) and i installed FreeRadius Version 2.1.10 from the packet
sources.
After i made some changes to the /etc/freeradius/modules/ldap to let my
radius know where the LDAP is and some other things it looks like this:
----------> /etc/freeradius/modules/ldap
ldap {
server = 172.26.100.1
identity = "uid=binduser,cn=users,ou=
Infrastruktur,dc=tarent,dc=de"
password = xxxxxxxx
basedn = "dc=tarent,dc=de"
filter = "(uid=%{%{Stripped-User-Name}:-%{User-Name}})"
base_filter = "(objectclass=posixAccount)"
groupname_attribute = cn
# groupmembership_filter =
"(|(&(objectClass=GroupOfNames)(member=%{control:Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{control:Ldap-UserDn})))"
groupmembership_filter =
"(&(objectClass=posixGroup)(memberUid=%{%{Stripped-User-Name}:-%{User-Name}}))"
# groupmembership_attribute = radiusGroupName
groupmembership_attribute = WLAN
# compare_check_items = yes
# do_xlat = yes
# access_attr_used_for_allow = yes
dictionary_mapping = /etc/freeradius/ldap.attrmap
password_attribute = CleartextPassword
set_auth_type = yes
}
when i start the freeradius with freeradius -X this is the output i get:
FreeRADIUS Version 2.1.10, for host x86_64-pc-linux-gnu, built on Sep 11
2012 at 17:06:46
Copyright (C) 1999-2009 The FreeRADIUS server project and contributors.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
You may redistribute copies of FreeRADIUS under the terms of the
GNU General Public License v2.
Starting - reading configuration files ...
including configuration file /etc/freeradius/radiusd.conf
including configuration file /etc/freeradius/proxy.conf
including configuration file /etc/freeradius/clients.conf
including files in directory /etc/freeradius/modules/
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/opendirectory
including configuration file /etc/freeradius/modules/dynamic_clients
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/detail
including configuration file
/etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/preprocess
including configuration file /etc/freeradius/modules/detail.log
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/echo
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/etc_group
including configuration file /etc/freeradius/modules/detail.example.com
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/policy
including configuration file /etc/freeradius/modules/attr_filter
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/unix
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/wimax
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/counter
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/eap.conf
including configuration file /etc/freeradius/policy.conf
including files in directory /etc/freeradius/sites-enabled/
including configuration file /etc/freeradius/sites-enabled/inner-tunnel
including configuration file /etc/freeradius/sites-enabled/default
main {
user = "freerad"
group = "freerad"
allow_core_dumps = no
}
including dictionary file /etc/freeradius/dictionary
main {
prefix = "/usr"
localstatedir = "/var"
logdir = "/var/log/freeradius"
libdir = "/usr/lib/freeradius"
radacctdir = "/var/log/freeradius/radacct"
hostname_lookups = no
max_request_time = 30
cleanup_delay = 5
max_requests = 1024
pidfile = "/var/run/freeradius/freeradius.pid"
checkrad = "/usr/sbin/checkrad"
debug_level = 0
proxy_requests = no
log {
stripped_names = no
auth = yes
auth_badpass = no
auth_goodpass = no
}
security {
max_attributes = 200
reject_delay = 1
status_server = yes
}
}
radiusd: #### Loading Realms and Home Servers ####
proxy server {
retry_delay = 5
retry_count = 3
default_fallback = no
dead_time = 120
wake_all_if_all_dead = no
}
home_server localhost {
ipaddr = 127.0.0.1
port = 1812
type = "auth"
secret = "testing123"
response_window = 20
max_outstanding = 65536
require_message_authenticator = yes
zombie_period = 40
status_check = "status-server"
ping_interval = 30
check_interval = 30
num_answers_to_alive = 3
num_pings_to_alive = 3
revive_interval = 120
status_check_timeout = 4
irt = 2
mrt = 16
mrc = 5
mrd = 30
}
home_server_pool my_auth_failover {
type = fail-over
home_server = localhost
}
realm example.com {
auth_pool = my_auth_failover
}
realm LOCAL {
}
radiusd: #### Loading Clients ####
client localhost {
ipaddr = 127.0.0.1
require_message_authenticator = no
secret = "testing123"
nastype = "other"
}
client man-netz {
ipaddr = 10.10.20.0
netmask = 23
require_message_authenticator = no
secret = "testing123"
nastype = "cisco"
}
radiusd: #### Instantiating modules ####
instantiate {
Module: Linked to module rlm_exec
Module: Instantiating module "exec" from file /etc/freeradius/modules/exec
exec {
wait = no
input_pairs = "request"
shell_escape = yes
}
Module: Linked to module rlm_expr
Module: Instantiating module "expr" from file /etc/freeradius/modules/expr
Module: Linked to module rlm_expiration
Module: Instantiating module "expiration" from file
/etc/freeradius/modules/expiration
expiration {
reply-message = "Password Has Expired "
}
Module: Linked to module rlm_logintime
Module: Instantiating module "logintime" from file
/etc/freeradius/modules/logintime
logintime {
reply-message = "You are calling outside your allowed timespan "
minimum-timeout = 60
}
}
radiusd: #### Loading Virtual Servers ####
server { # from file /etc/freeradius/radiusd.conf
modules {
Module: Checking authenticate {...} for more modules to load
Module: Linked to module rlm_mschap
Module: Instantiating module "mschap" from file
/etc/freeradius/modules/mschap
mschap {
use_mppe = yes
require_encryption = no
require_strong = no
with_ntdomain_hack = yes
}
Module: Linked to module rlm_ldap
Module: Instantiating module "ldap" from file /etc/freeradius/modules/ldap
ldap {
server = "172.26.100.1"
port = 389
password = "AhRohr7Z"
identity = "uid=binduser,cn=users,ou=Infrastruktur,dc=tarent,dc=de"
net_timeout = 10
timeout = 20
timelimit = 20
tls_mode = no
start_tls = no
tls_require_cert = "allow"
basedn = "dc=tarent,dc=de"
filter = "(uid=%{%{Stripped-User-Name}:-%{User-Name}})"
base_filter = "(objectclass=posixAccount)"
password_attribute = "CleartextPassword"
auto_header = no
access_attr_used_for_allow = yes
groupname_attribute = "cn"
groupmembership_filter =
"(&(objectClass=posixGroup)(memberUid=%{%{Stripped-User-Name}:-%{User-Name}}))"
groupmembership_attribute = "WLAN"
dictionary_mapping = "/etc/freeradius/ldap.attrmap"
ldap_debug = 0
ldap_connections_number = 5
compare_check_items = no
do_xlat = yes
edir_account_policy_check = yes
set_auth_type = yes
}
rlm_ldap: Registering ldap_groupcmp for Ldap-Group
rlm_ldap: Registering ldap_xlat with xlat_name ldap
rlm_ldap: reading ldap<->radius mappings from file
/etc/freeradius/ldap.attrmap
rlm_ldap: LDAP radiusCheckItem mapped to RADIUS $GENERIC$
rlm_ldap: LDAP radiusReplyItem mapped to RADIUS $GENERIC$
rlm_ldap: LDAP radiusAuthType mapped to RADIUS Auth-Type
rlm_ldap: LDAP radiusSimultaneousUse mapped to RADIUS Simultaneous-Use
rlm_ldap: LDAP radiusCalledStationId mapped to RADIUS Called-Station-Id
rlm_ldap: LDAP radiusCallingStationId mapped to RADIUS Calling-Station-Id
rlm_ldap: LDAP lmPassword mapped to RADIUS LM-Password
rlm_ldap: LDAP ntPassword mapped to RADIUS NT-Password
rlm_ldap: LDAP sambaLmPassword mapped to RADIUS LM-Password
rlm_ldap: LDAP sambaNtPassword mapped to RADIUS NT-Password
rlm_ldap: LDAP dBCSPwd mapped to RADIUS LM-Password
rlm_ldap: LDAP userPassword mapped to RADIUS Password-With-Header
rlm_ldap: LDAP acctFlags mapped to RADIUS SMB-Account-CTRL-TEXT
rlm_ldap: LDAP radiusExpiration mapped to RADIUS Expiration
rlm_ldap: LDAP radiusNASIpAddress mapped to RADIUS NAS-IP-Address
rlm_ldap: LDAP radiusServiceType mapped to RADIUS Service-Type
rlm_ldap: LDAP radiusFramedProtocol mapped to RADIUS Framed-Protocol
rlm_ldap: LDAP radiusFramedIPAddress mapped to RADIUS Framed-IP-Address
rlm_ldap: LDAP radiusFramedIPNetmask mapped to RADIUS Framed-IP-Netmask
rlm_ldap: LDAP radiusFramedRoute mapped to RADIUS Framed-Route
rlm_ldap: LDAP radiusFramedRouting mapped to RADIUS Framed-Routing
rlm_ldap: LDAP radiusFilterId mapped to RADIUS Filter-Id
rlm_ldap: LDAP radiusFramedMTU mapped to RADIUS Framed-MTU
rlm_ldap: LDAP radiusFramedCompression mapped to RADIUS Framed-Compression
rlm_ldap: LDAP radiusLoginIPHost mapped to RADIUS Login-IP-Host
rlm_ldap: LDAP radiusLoginService mapped to RADIUS Login-Service
rlm_ldap: LDAP radiusLoginTCPPort mapped to RADIUS Login-TCP-Port
rlm_ldap: LDAP radiusCallbackNumber mapped to RADIUS Callback-Number
rlm_ldap: LDAP radiusCallbackId mapped to RADIUS Callback-Id
rlm_ldap: LDAP radiusFramedIPXNetwork mapped to RADIUS Framed-IPX-Network
rlm_ldap: LDAP radiusClass mapped to RADIUS Class
rlm_ldap: LDAP radiusSessionTimeout mapped to RADIUS Session-Timeout
rlm_ldap: LDAP radiusIdleTimeout mapped to RADIUS Idle-Timeout
rlm_ldap: LDAP radiusTerminationAction mapped to RADIUS Termination-Action
rlm_ldap: LDAP radiusLoginLATService mapped to RADIUS Login-LAT-Service
rlm_ldap: LDAP radiusLoginLATNode mapped to RADIUS Login-LAT-Node
rlm_ldap: LDAP radiusLoginLATGroup mapped to RADIUS Login-LAT-Group
rlm_ldap: LDAP radiusFramedAppleTalkLink mapped to RADIUS
Framed-AppleTalk-Link
rlm_ldap: LDAP radiusFramedAppleTalkNetwork mapped to RADIUS
Framed-AppleTalk-Network
rlm_ldap: LDAP radiusFramedAppleTalkZone mapped to RADIUS
Framed-AppleTalk-Zone
rlm_ldap: LDAP radiusPortLimit mapped to RADIUS Port-Limit
rlm_ldap: LDAP radiusLoginLATPort mapped to RADIUS Login-LAT-Port
rlm_ldap: LDAP radiusReplyMessage mapped to RADIUS Reply-Message
rlm_ldap: LDAP radiusTunnelType mapped to RADIUS Tunnel-Type
rlm_ldap: LDAP radiusTunnelMediumType mapped to RADIUS Tunnel-Medium-Type
rlm_ldap: LDAP radiusTunnelPrivateGroupId mapped to RADIUS
Tunnel-Private-Group-Id
conns: 0x1c6dbf0
Module: Linked to module rlm_eap
Module: Instantiating module "eap" from file /etc/freeradius/eap.conf
eap {
default_eap_type = "md5"
timer_expire = 60
ignore_unknown_eap_types = no
cisco_accounting_username_bug = no
max_sessions = 4096
}
Module: Linked to sub-module rlm_eap_md5
Module: Instantiating eap-md5
Module: Linked to sub-module rlm_eap_leap
Module: Instantiating eap-leap
Module: Linked to sub-module rlm_eap_gtc
Module: Instantiating eap-gtc
gtc {
challenge = "Password: "
auth_type = "PAP"
}
Module: Linked to sub-module rlm_eap_tls
Module: Instantiating eap-tls
tls {
rsa_key_exchange = no
dh_key_exchange = yes
rsa_key_length = 512
dh_key_length = 512
verify_depth = 0
CA_path = "/etc/freeradius/certs"
pem_file_type = yes
private_key_file = "/etc/freeradius/certs/server.key"
certificate_file = "/etc/freeradius/certs/server.pem"
private_key_password = "3TBR4yYD1ok1Ki5H"
dh_file = "/etc/freeradius/certs/dh"
random_file = "/dev/urandom"
fragment_size = 1024
include_length = yes
check_crl = yes
check_cert_cn = "%{User-Name}"
cipher_list = "DEFAULT"
make_cert_command = "/etc/freeradius/certs/bootstrap"
cache {
enable = no
lifetime = 24
max_entries = 255
}
verify {
}
}
Module: Linked to sub-module rlm_eap_ttls
Module: Instantiating eap-ttls
ttls {
default_eap_type = "md5"
copy_request_to_tunnel = no
use_tunneled_reply = no
include_length = yes
}
Module: Linked to sub-module rlm_eap_peap
Module: Instantiating eap-peap
peap {
default_eap_type = "mschapv2"
copy_request_to_tunnel = no
use_tunneled_reply = no
proxy_tunneled_request_as_eap = yes
virtual_server = "inner-tunnel"
}
Module: Linked to sub-module rlm_eap_mschapv2
Module: Instantiating eap-mschapv2
mschapv2 {
with_ntdomain_hack = yes
}
Module: Checking authorize {...} for more modules to load
Module: Linked to module rlm_chap
Module: Instantiating module "chap" from file /etc/freeradius/modules/chap
Module: Checking post-auth {...} for more modules to load
Module: Linked to module rlm_always
Module: Instantiating module "fail" from file
/etc/freeradius/modules/always
always fail {
rcode = "fail"
simulcount = 0
mpp = no
}
} # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
type = "auth"
ipaddr = *
port = 0
}
listen {
type = "acct"
ipaddr = *
port = 0
}
listen {
type = "auth"
ipaddr = *
port = 1645
}
listen {
type = "acct"
ipaddr = *
port = 1646
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on authentication address * port 1645
Listening on accounting address * port 1646
Ready to process requests.
I dont see any critical errors so i tried the radtest command.
------ radtest -x testuser password123 127.0.0.1 10 testing123
Sending Access-Request of id 247 to 127.0.0.1 port 1812
User-Name = "testuser"
User-Password = "password123"
NAS-IP-Address = 10.10.20.36
NAS-Port = 10
rad_recv: Access-Accept packet from host 127.0.0.1 port 1812, id=247,
length=20
------- radius output:
rad_recv: Access-Request packet from host 127.0.0.1 port 58762, id=247,
length=58
User-Name = "testuser"
User-Password = "password123"
NAS-IP-Address = 10.10.20.36
NAS-Port = 10
# Executing section authorize from file
/etc/freeradius/sites-enabled/inner-tunnel
+- entering group authorize {...}
++[chap] returns noop
++[mschap] returns noop
[eap] No EAP-Message, not doing EAP
++[eap] returns noop
[ldap] performing user authorization for whaeri
[ldap] expand: %{Stripped-User-Name} ->
[ldap] ... expanding second conditional
[ldap] expand: %{User-Name} -> testuser
[ldap] expand: (uid=%{%{Stripped-User-Name}:-%{User-Name}}) ->
(uid=testuser)
[ldap] expand: dc=tarent,dc=de -> dc=tarent,dc=de
[ldap] ldap_get_conn: Checking Id: 0
[ldap] ldap_get_conn: Got Id: 0
[ldap] attempting LDAP reconnection
[ldap] (re)connect to 172.26.100.1:389, authentication 0
[ldap] bind as
uid=binduser,cn=users,ou=Infrastruktur,dc=tarent,dc=de/xxxxxxxxx to
172.26.100.1:389
[ldap] waiting for bind result ...
[ldap] Bind was successful
[ldap] performing search in dc=tarent,dc=de, with filter (uid=testuser)
[ldap] No default NMAS login sequence
[ldap] looking for check items in directory...
[ldap] userPassword -> Password-With-Header ==
"{crypt}$1$l4Je/bMr$IEKzWS2SQ78eEfM/a6VB7/"
[ldap] looking for reply items in directory...
[ldap] Setting Auth-Type = LDAP
[ldap] user whaeri authorized to use remote access
[ldap] ldap_release_conn: Release Id: 0
++[ldap] returns ok
Found Auth-Type = LDAP
# Executing group from file /etc/freeradius/sites-enabled/inner-tunnel
+- entering group LDAP {...}
[ldap] login attempt by "testuser" with password "password123"
[ldap] user DN: uid=whaeri,cn=users,dc=tarent,dc=de
[ldap] (re)connect to 172.26.100.1:389, authentication 1
[ldap] bind as uid=testuser,cn=users,dc=tarent,dc=de/password123 to
172.26.100.1:389
[ldap] waiting for bind result ...
[ldap] Bind was successful
[ldap] user testuser authenticated succesfully
++[ldap] returns ok
Login OK: [testuser] (from client localhost port 10)
# Executing section post-auth from file
/etc/freeradius/sites-enabled/inner-tunnel
+- entering group post-auth {...}
++? if (!(Ldap-Group == WLAN))
[ldap] Entering ldap_groupcmp()
expand: dc=tarent,dc=de -> dc=tarent,dc=de
expand: %{Stripped-User-Name} ->
... expanding second conditional
expand: %{User-Name} -> whaeri
expand:
(&(objectClass=posixGroup)(memberUid=%{%{Stripped-User-Name}:-%{User-Name}}))
-> (&(objectClass=posixGroup)(memberUid=testuser))
[ldap] ldap_get_conn: Checking Id: 0
[ldap] ldap_get_conn: Got Id: 0
[ldap] performing search in dc=tarent,dc=de, with filter
(&(cn=WLAN)(&(objectClass=posixGroup)(memberUid=testuser)))
rlm_ldap::ldap_groupcmp: User found in group WLAN
[ldap] ldap_release_conn: Release Id: 0
?? Evaluating (Ldap-Group == WLAN) -> TRUE
? Converting !TRUE -> FALSE
++? if (!(Ldap-Group == WLAN)) -> FALSE
Sending Access-Accept of id 247 to 127.0.0.1 port 58762
Finished request 0.
Going to the next request
I am very happy to see that my request was accepted, so i configured my
Cisco Access Point so i could access the w-lan with my mobile phone or my
linux laptop.
----- Login attempt with eap tls
rad_recv: Access-Request packet from host 10.10.20.43 port 1645, id=134,
length=151
User-Name = "farenz"
Framed-MTU = 1400
Called-Station-Id = "001b.8f8a.ac30"
Calling-Station-Id = "1cb0.9475.d65a"
Service-Type = Login-User
Message-Authenticator = 0x5dfdd286bcfbe2d2ec991382dfdb612a
EAP-Message = 0x02020006030d
NAS-Port-Type = Wireless-802.11
NAS-Port = 335
NAS-Port-Id = "335"
State = 0x8775567a8777525d448a92d78bfaa32e
NAS-IP-Address = 10.10.20.43
NAS-Identifier = "ap-bn-test"
# Executing section authorize from file
/etc/freeradius/sites-enabled/inner-tunnel
+- entering group authorize {...}
++[chap] returns noop
++[mschap] returns noop
[eap] EAP packet type response id 2 length 6
[eap] No EAP Start, assuming it's an on-going EAP conversation
++[eap] returns updated
[ldap] performing user authorization for farenz
[ldap] expand: %{Stripped-User-Name} ->
[ldap] ... expanding second conditional
[ldap] expand: %{User-Name} -> farenz
[ldap] expand: (uid=%{%{Stripped-User-Name}:-%{User-Name}}) -> (uid=farenz)
[ldap] expand: dc=tarent,dc=de -> dc=tarent,dc=de
[ldap] ldap_get_conn: Checking Id: 0
[ldap] ldap_get_conn: Got Id: 0
[ldap] performing search in dc=tarent,dc=de, with filter (uid=farenz)
[ldap] No default NMAS login sequence
[ldap] looking for check items in directory...
[ldap] userPassword -> Password-With-Header ==
"{crypt}$1$wNTQUAjn$f0ragZNFWuArJ3FMbA2WW1"
[ldap] looking for reply items in directory...
[ldap] user farenz authorized to use remote access
[ldap] ldap_release_conn: Release Id: 0
++[ldap] returns ok
Found Auth-Type = EAP
# Executing group from file /etc/freeradius/sites-enabled/inner-tunnel
+- entering group authenticate {...}
[eap] Request found, released from the list
[eap] EAP NAK
[eap] EAP-NAK asked for EAP-Type/tls
[eap] processing type tls
[tls] Requiring client certificate
[tls] Initiate
[tls] Start returned 1
++[eap] returns handled
Sending Access-Challenge of id 134 to 10.10.20.43 port 1645
EAP-Message = 0x010300060d20
Message-Authenticator = 0x00000000000000000000000000000000
State = 0x8775567a86765b5d448a92d78bfaa32e
Finished request 4.
Going to the next request
Near the end the Radius output says:
> [tls] Requiring client certificate
Then i've read http://deployingradius.com/documents/configuration/eap.htmlbut
i cant finde such a Validate Server Certificate option to uncheck.
Now even if i am able to create a good certificate, i had to deploy it on
about 500 Computers.
Is it possible to use freeradius without such certificates?
And if not, you might show me how to create a certificate and get this
server running?
Thank you in advance.
With best regards,
Florian
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