FreeRadius - LDAP

m4xmr m.tommasi at purplesrl.com
Wed Jul 20 11:52:27 CEST 2011


Il 20/07/11 10.19, Fajar A. Nugraha-2 [via FreeRadius] ha scritto:
> On Wed, Jul 20, 2011 at 3:07 PM, m4xmr <[hidden email]
> </user/SendEmail.jtp?type=node&node=4615111&i=0>> wrote:
>> Hello,
>> I'm trying to make working LDAP as authentication backend for RADIUS.
>> I verified that the data are right and the query to LDAP is properly
> working
>> if I use ldapsearch.
> 
> does LDAP BIND work correctly using ldapsearch (i.e. ldapsearch -D)

I tried:  ldapsearch -x -b "dc=example,dc=com" "uid=ldapuser"
and it works good:
# extended LDIF
#
# LDAPv3
# base <dc=example,dc=com> with scope subtree
# filter: uid=ldapuser
# requesting: ALL
#

# ldapuser, People, example.com
dn: uid=ldapuser,ou=People,dc=example,dc=com
uid: ldapuser
cn: ldapuser
objectClass: account
objectClass: posixAccount
objectClass: top
objectClass: shadowAccount
userPassword:: MTIxMjEyIA==
shadowLastChange: 15174
shadowMin: 0
shadowMax: 99999
shadowWarning: 7
loginShell: /bin/bash
uidNumber: 500
gidNumber: 100
homeDirectory: /home/ldapuser

# search result
search: 2
result: 0 Success

# numResponses: 2
# numEntries: 1

> 
>> rad_recv: Access-Request packet from host 127.0.0.1:59221, id=78,
> length=60
>>        User-Name = "ldapuser"
>>        User-Password = "121212"
> 
>> rlm_ldap: Setting Auth-Type = ldap
> 
> Hmmm ... that's odd. I thought rlm_ldap was supposed to just grab
> attributes (e.g. Cleartext-Password) and not set the Auth-Type? Are
> you doing anything special like forcing Auth-Type := LDAP?

I was following a tutorial, this one:

http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch31_:_Centralized_Logins_Using_LDAP_and_RADIUS
> 
>> rlm_ldap: user ldapuser authorized to use remote access
> 
> this line says there's a user called ldapuser
> 
>> rlm_ldap: - authenticate
>> rlm_ldap: login attempt by "ldapuser" with password "121212"
>> rlm_ldap: user DN: uid=ldapuser,ou=People,dc=example,dc=com
>> rlm_ldap: (re)connect to localhost:389, authentication 1
>> rlm_ldap: bind as uid=ldapuser,ou=People,dc=example,dc=com/121212 to
>> localhost:389
>> rlm_ldap: waiting for bind result ...
>> rlm_ldap: Bind failed with invalid credentials
> 
> ... while this one says the bind failed. Is the password correct?

I configured that password..., it could be some problem of hasing..., maybe.

Anyway I have upgraded to FreeRADIUS Version 2.1.7
this is the output of radiusd -X

radiusd -X
FreeRADIUS Version 2.1.7, for host i686-redhat-linux-gnu, built on Mar
31 2010 at 00:25:31
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/raddb/radiusd.conf
including configuration file /etc/raddb/proxy.conf
including configuration file /etc/raddb/clients.conf
including files in directory /etc/raddb/modules/
including configuration file /etc/raddb/modules/digest
including configuration file /etc/raddb/modules/exec
including configuration file /etc/raddb/modules/cui
including configuration file /etc/raddb/modules/realm
including configuration file /etc/raddb/modules/attr_rewrite
including configuration file /etc/raddb/modules/radutmp
including configuration file /etc/raddb/modules/sradutmp
including configuration file /etc/raddb/modules/detail.example.com
including configuration file /etc/raddb/modules/linelog
including configuration file /etc/raddb/modules/smsotp
including configuration file /etc/raddb/modules/ippool
including configuration file /etc/raddb/modules/wimax
including configuration file /etc/raddb/modules/detail
including configuration file /etc/raddb/modules/inner-eap
including configuration file /etc/raddb/modules/passwd
including configuration file /etc/raddb/modules/mschap
including configuration file /etc/raddb/modules/files
including configuration file /etc/raddb/modules/smbpasswd
including configuration file /etc/raddb/modules/ldap
including configuration file /etc/raddb/modules/etc_group
including configuration file /etc/raddb/modules/always
including configuration file /etc/raddb/modules/counter
including configuration file /etc/raddb/modules/echo
including configuration file /etc/raddb/modules/sqlcounter_expire_on_login
including configuration file /etc/raddb/modules/checkval
including configuration file /etc/raddb/modules/sql_log
including configuration file /etc/raddb/modules/pam
including configuration file /etc/raddb/modules/mac2vlan
including configuration file /etc/raddb/modules/chap
including configuration file /etc/raddb/modules/pap
including configuration file /etc/raddb/modules/mac2ip
including configuration file /etc/raddb/modules/otp
including configuration file /etc/raddb/modules/unix
including configuration file /etc/raddb/modules/policy
including configuration file /etc/raddb/modules/detail.log
including configuration file /etc/raddb/modules/attr_filter
including configuration file /etc/raddb/modules/acct_unique
including configuration file /etc/raddb/modules/expr
including configuration file /etc/raddb/modules/expiration
including configuration file /etc/raddb/modules/logintime
including configuration file /etc/raddb/modules/perl
including configuration file /etc/raddb/modules/preprocess
including configuration file /etc/raddb/eap.conf
including configuration file /etc/raddb/policy.conf
including files in directory /etc/raddb/sites-enabled/
including configuration file /etc/raddb/sites-enabled/default
including configuration file /etc/raddb/sites-enabled/inner-tunnel
including configuration file /etc/raddb/sites-enabled/control-socket
group = radiusd
user = radiusd
including dictionary file /etc/raddb/dictionary
main {
	prefix = "/usr"
	localstatedir = "/var"
	logdir = "/var/log/radius"
	libdir = "/usr/lib/freeradius"
	radacctdir = "/var/log/radius/radacct"
	hostname_lookups = no
	max_request_time = 30
	cleanup_delay = 5
	max_requests = 1024
	allow_core_dumps = no
	pidfile = "/var/run/radiusd/radiusd.pid"
	checkrad = "/usr/sbin/checkrad"
	debug_level = 0
	proxy_requests = yes
 log {
	stripped_names = no
	auth = no
	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 = no
	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"
 }
radiusd: #### Instantiating modules ####
 instantiate {
 Module: Linked to module rlm_exec
 Module: Instantiating exec
  exec {
	wait = no
	input_pairs = "request"
	shell_escape = yes
  }
 Module: Linked to module rlm_expr
 Module: Instantiating expr
 Module: Linked to module rlm_expiration
 Module: Instantiating expiration
  expiration {
	reply-message = "Password Has Expired  "
  }
 Module: Linked to module rlm_logintime
 Module: Instantiating logintime
  logintime {
	reply-message = "You are calling outside your allowed timespan  "
	minimum-timeout = 60
  }
 }
radiusd: #### Loading Virtual Servers ####
server inner-tunnel {
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_pap
 Module: Instantiating pap
  pap {
	encryption_scheme = "auto"
	auto_header = no
  }
 Module: Linked to module rlm_chap
 Module: Instantiating chap
 Module: Linked to module rlm_mschap
 Module: Instantiating mschap
  mschap {
	use_mppe = yes
	require_encryption = no
	require_strong = no
	with_ntdomain_hack = no
  }
 Module: Linked to module rlm_unix
 Module: Instantiating unix
  unix {
	radwtmp = "/var/log/radius/radwtmp"
  }
 Module: Linked to module rlm_eap
 Module: Instantiating eap
  eap {
	default_eap_type = "md5"
	timer_expire = 60
	ignore_unknown_eap_types = no
	cisco_accounting_username_bug = no
	max_sessions = 2048
  }
 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
	pem_file_type = yes
	private_key_file = "/etc/raddb/certs/server.pem"
	certificate_file = "/etc/raddb/certs/server.pem"
	CA_file = "/etc/raddb/certs/ca.pem"
	private_key_password = "whatever"
	dh_file = "/etc/raddb/certs/dh"
	random_file = "/etc/raddb/certs/random"
	fragment_size = 1024
	include_length = yes
	check_crl = no
	cipher_list = "DEFAULT"
	make_cert_command = "/etc/raddb/certs/bootstrap"
    cache {
	enable = no
	lifetime = 24
	max_entries = 255
    }
   }
 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
	virtual_server = "inner-tunnel"
	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 = no
   }
 Module: Checking authorize {...} for more modules to load
 Module: Linked to module rlm_realm
 Module: Instantiating suffix
  realm suffix {
	format = "suffix"
	delimiter = "@"
	ignore_default = no
	ignore_null = no
  }
 Module: Linked to module rlm_files
 Module: Instantiating files
  files {
	usersfile = "/etc/raddb/users"
	acctusersfile = "/etc/raddb/acct_users"
	preproxy_usersfile = "/etc/raddb/preproxy_users"
	compat = "no"
  }
 Module: Checking session {...} for more modules to load
 Module: Linked to module rlm_radutmp
 Module: Instantiating radutmp
  radutmp {
	filename = "/var/log/radius/radutmp"
	username = "%{User-Name}"
	case_sensitive = yes
	check_with_nas = yes
	perm = 384
	callerid = yes
  }
 Module: Checking post-proxy {...} for more modules to load
 Module: Checking post-auth {...} for more modules to load
 Module: Linked to module rlm_attr_filter
 Module: Instantiating attr_filter.access_reject
  attr_filter attr_filter.access_reject {
	attrsfile = "/etc/raddb/attrs.access_reject"
	key = "%{User-Name}"
  }
 } # modules
} # server
server {
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_ldap
 Module: Instantiating ldap
  ldap {
	server = "localhost"
	port = 389
	password = ""
	identity = ""
	net_timeout = 1
	timeout = 4
	timelimit = 3
	tls_mode = no
	start_tls = no
	tls_require_cert = "allow"
   tls {
	start_tls = no
	require_cert = "allow"
   }
	basedn = "dc=example,dc=com"
	filter = "(uid=%{%{Stripped-User-Name}:-%{User-Name}})"
	base_filter = "(objectclass=radiusprofile)"
	auto_header = no
	access_attr_used_for_allow = yes
	groupname_attribute = "cn"
	groupmembership_filter =
"(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"
	dictionary_mapping = "/etc/raddb/ldap.attrmap"
	ldap_debug = 0
	ldap_connections_number = 5
	compare_check_items = no
	do_xlat = 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/raddb/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 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: 0x89d0250
 Module: Checking authorize {...} for more modules to load
 Module: Linked to module rlm_preprocess
 Module: Instantiating preprocess
  preprocess {
	huntgroups = "/etc/raddb/huntgroups"
	hints = "/etc/raddb/hints"
	with_ascend_hack = no
	ascend_channels_per_line = 23
	with_ntdomain_hack = no
	with_specialix_jetstream_hack = no
	with_cisco_vsa_hack = no
	with_alvarion_vsa_hack = no
  }
 Module: Checking preacct {...} for more modules to load
 Module: Linked to module rlm_acct_unique
 Module: Instantiating acct_unique
  acct_unique {
	key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address,
NAS-Port"
  }
 Module: Checking accounting {...} for more modules to load
 Module: Linked to module rlm_detail
 Module: Instantiating detail
  detail {
	detailfile = "/var/log/radius/radacct/%{Client-IP-Address}/detail-%Y%m%d"
	header = "%t"
	detailperm = 384
	dirperm = 493
	locking = no
	log_packet_header = no
  }
 Module: Instantiating attr_filter.accounting_response
  attr_filter attr_filter.accounting_response {
	attrsfile = "/etc/raddb/attrs.accounting_response"
	key = "%{User-Name}"
  }
 Module: Checking session {...} for more modules to load
 Module: Checking post-proxy {...} for more modules to load
 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
}
listen {
	type = "control"
 listen {
	socket = "/var/run/radiusd/radiusd.sock"
 }
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on command file /var/run/radiusd/radiusd.sock
Listening on proxy address * port 1814
Ready to process requests.

--->

NOW, when I try the auth:
radtest ldapuser 121212 localhost 2 testing123

I get this output on the client side

Sending Access-Request of id 207 to 127.0.0.1 port 1812
	User-Name = "ldapuser"
	User-Password = "MTIxMjEyIA=="
	NAS-IP-Address = 127.0.0.1
	NAS-Port = 2
rad_recv: Access-Reject packet from host 127.0.0.1 port 1812, id=207,
length=20

AND this one on the radius server side:

rad_recv: Access-Request packet from host 127.0.0.1 port 36725, id=207,
length=60
	User-Name = "ldapuser"
	User-Password = "MTIxMjEyIA=="
	NAS-IP-Address = 127.0.0.1
	NAS-Port = 2
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "ldapuser", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] No EAP-Message, not doing EAP
++[eap] returns noop
++[unix] returns notfound
++[files] returns noop
[ldap] performing user authorization for ldapuser
[ldap] 	expand: %{Stripped-User-Name} ->
[ldap] 	expand: %{User-Name} -> ldapuser
[ldap] 	expand: (uid=%{%{Stripped-User-Name}:-%{User-Name}}) ->
(uid=ldapuser)
[ldap] 	expand: dc=example,dc=com -> dc=example,dc=com
rlm_ldap: ldap_get_conn: Checking Id: 0
rlm_ldap: ldap_get_conn: Got Id: 0
rlm_ldap: attempting LDAP reconnection
rlm_ldap: (re)connect to localhost:389, authentication 0
rlm_ldap: bind as / to localhost:389
rlm_ldap: waiting for bind result ...
rlm_ldap: Bind was successful
rlm_ldap: performing search in dc=example,dc=com, with filter (uid=ldapuser)
[ldap] looking for check items in directory...
[ldap] looking for reply items in directory...
WARNING: No "known good" password was found in LDAP.  Are you sure that
the user is configured correctly?
[ldap] Setting Auth-Type = LDAP
[ldap] user ldapuser authorized to use remote access
rlm_ldap: ldap_release_conn: Release Id: 0
++[ldap] returns ok
++[expiration] returns noop
++[logintime] returns noop
[pap] WARNING! No "known good" password found for the user.
Authentication may fail because of this.
++[pap] returns noop
Found Auth-Type = LDAP
+- entering group LDAP {...}
[ldap] login attempt by "ldapuser" with password "MTIxMjEyIA=="
[ldap] user DN: uid=ldapuser,ou=People,dc=example,dc=com
rlm_ldap: (re)connect to localhost:389, authentication 1
rlm_ldap: bind as uid=ldapuser,ou=People,dc=example,dc=com/MTIxMjEyIA==
to localhost:389
rlm_ldap: waiting for bind result ...
rlm_ldap: Bind failed with invalid credentials
++[ldap] returns reject
Failed to authenticate the user.
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject] 	expand: %{User-Name} -> ldapuser
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 0 for 1 seconds
Going to the next request
Waking up in 0.5 seconds.
Sending delayed reject for request 0
Sending Access-Reject of id 207 to 127.0.0.1 port 36725
Waking up in 4.9 seconds.
Cleaning up request 0 ID 207 with timestamp +1224
Ready to process requests.

Do you have any idea?
I'm not seeing something?


Regards,
Max


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> Fajar
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