Freeradius +LDAP + Active Directory + Authenticate Only questions

17 Jan 2008

      I am trying to setup Freeradius to authenticate against an active
directory server.  I do not want it to do a ldapsearch to get
authorization. I have looked on the mailing lists but have not found how
to do this in my situation. I did read the rlm_ldap manual and am aware
of the ldap-UserDN variable. I am unable to get Freeradius to set the
bind DN to what I attempt to set the ldap-userdn variable to in the
authentication phase. It insists on setting DN to the entire CN.

Any clues?

Thanks.

Here are the relevant files:

/etc/raddb/radiusd.conf
*****************************************************************************************

prefix = /usr
exec_prefix = ${prefix}
sysconfdir = /etc
localstatedir = /var
sbindir = ${exec_prefix}/sbin
logdir = ${localstatedir}/log/radius
raddbdir = ${sysconfdir}/raddb
radacctdir = ${logdir}/radacct
confdir = ${raddbdir}
run_dir = ${localstatedir}/run/radiusd
log_file = ${logdir}/radius.log
libdir = /usr/lib64
pidfile = ${run_dir}/radiusd.pid
user = radiusd
group = radiusd
max_request_time = 30
delete_blocked_requests = no
cleanup_delay = 5
max_requests = 1024
bind_address = *
port = 0
hostname_lookups = no
allow_core_dumps = no
regular_expressions	= yes
extended_expressions	= yes
log_stripped_names = no
log_auth = no
log_auth_badpass = no
log_auth_goodpass = no
usercollide = no
lower_user = no
lower_pass = no
nospace_user = no
nospace_pass = no
checkrad = ${sbindir}/checkrad

security {
	max_attributes = 200
	reject_delay = 1
	status_server = no
}

proxy_requests  = yes
$INCLUDE  ${confdir}/proxy.conf
$INCLUDE  ${confdir}/clients.conf
snmp	= no
$INCLUDE  ${confdir}/snmp.conf

thread pool {
	start_servers = 5
	max_servers = 32
	min_spare_servers = 3
	max_spare_servers = 10
	max_requests_per_server = 0
}

modules {

	pap {
		auto_header = yes
	}

	chap {
		authtype = CHAP
	}

	pam {

		pam_auth = radiusd
	}

	unix {
		cache = no
		cache_reload = 600
		radwtmp = ${logdir}/radwtmp
	}

$INCLUDE ${confdir}/eap.conf

	mschap {
	}

	ldap {
		server = "ldaps://ad-ldap.subdomain.domain.com"
		port = 636
		identity = "username"
		password = "password"
		basedn = "ou=North America,dc=subdomain,dc=domain,dc=com"
		ldap_debug = 0x0028
		binddn = "(SamAccountName=%u)"
		base_filter = "(objectclass=*)"
		filter = "(SamAccountName=%u)"
		start_tls = no
		tls_require_cert	= "never"
		password_radius_attribute = "NT-Password"
		password_attribute = "userPassword"
		password_header = "{clear}"
		#access_attr = "telephoneNumber"
		dictionary_mapping = ${raddbdir}/ldap.attrmap
		ldap_connections_number = 5
		edir_account_policy_check=no
		#default_profile = "ladp-userdn"
		#groupname_attribute = cn
		#groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=
%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=
%{Ldap-UserDn})))"
		#groupmembership_attribute = memberOf 
		timeout = 4
		timelimit = 3
		net_timeout = 1
	}

	realm IPASS {
		format = prefix
		delimiter = "/"
		ignore_default = no
		ignore_null = no
	}

	realm suffix {
		format = suffix
		delimiter = "@"
		ignore_default = no
		ignore_null = no
	}

	realm realmpercent {
		format = suffix
		delimiter = "%"
		ignore_default = no
		ignore_null = no
	}

	realm ntdomain {
		format = prefix
		delimiter = "\\"
		ignore_default = no
		ignore_null = no
	}	

	checkval {
		item-name = Calling-Station-Id
		check-name = Calling-Station-Id
		data-type = string
	}

	preprocess {
		huntgroups = ${confdir}/huntgroups
		hints = ${confdir}/hints
		with_ascend_hack = no
		ascend_channels_per_line = 23
		with_ntdomain_hack = no
		with_specialix_jetstream_hack = no
		with_cisco_vsa_hack = no
	}

	files {
		usersfile = ${confdir}/users
		acctusersfile = ${confdir}/acct_users
		preproxy_usersfile = ${confdir}/preproxy_users
		compat = no
	}

	detail {

		detailfile = ${radacctdir}/%{Client-IP-Address}/detail-%Y%m%d
		detailperm = 0600
	}

	acct_unique {
		key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address,
NAS-Port"
	}

	$INCLUDE  ${confdir}/sql.conf

	radutmp {
		filename = ${logdir}/radutmp
		username = %{User-Name}
		case_sensitive = yes
		check_with_nas = yes		
		perm = 0600
		callerid = "yes"
	}

	radutmp sradutmp {
		filename = ${logdir}/sradutmp
		perm = 0644
		callerid = "no"
	}

	attr_filter {
		attrsfile = ${confdir}/attrs
	}

	counter daily {
		filename = ${raddbdir}/db.daily
		key = User-Name
		count-attribute = Acct-Session-Time
		reset = daily
		counter-name = Daily-Session-Time
		check-name = Max-Daily-Session
		allowed-servicetype = Framed-User
		cache-size = 5000
	}

	sqlcounter dailycounter {
		counter-name = Daily-Session-Time
		check-name = Max-Daily-Session
		reply-name = Session-Timeout
		sqlmod-inst = sql
		key = User-Name
		reset = daily

		query = "SELECT SUM(AcctSessionTime - \
                 GREATEST((%b - UNIX_TIMESTAMP(AcctStartTime)), 0)) \
                 FROM radacct WHERE UserName='%{%k}' AND \
                 UNIX_TIMESTAMP(AcctStartTime) + AcctSessionTime > '%b'"
	}

	sqlcounter monthlycounter {
		counter-name = Monthly-Session-Time
		check-name = Max-Monthly-Session
		reply-name = Session-Timeout
		sqlmod-inst = sql
		key = User-Name
		reset = monthly
		query = "SELECT SUM(AcctSessionTime - \
                 GREATEST((%b - UNIX_TIMESTAMP(AcctStartTime)), 0)) \
                 FROM radacct WHERE UserName='%{%k}' AND \
                 UNIX_TIMESTAMP(AcctStartTime) + AcctSessionTime > '%b'"
	}

	always reject {
		rcode = reject
	}
	always ok {
		rcode = ok
		simulcount = 0
		mpp = no
	}

	expr {
	}

	digest {
	}

	exec {
		wait = yes
		input_pairs = request
	}

	exec echo {
		wait = yes
		program = "/bin/echo %{User-Name}"
		input_pairs = request
		output_pairs = reply
	}
}

instantiate {
	exec
	expr
}

authorize {
	preprocess
#	ldap
	pap
	chap
	mschap
	suffix
	ntdomain
	eap
	files
}

authenticate {
        Auth-Type LDAP {
	                ldap
		        }

	Auth-Type PAP {
		pap
	}

	Auth-Type CHAP {
		chap
	}

	Auth-Type MS-CHAP {
		mschap
	}

	unix

	eap
}

preacct {
	preprocess
	acct_unique
	files
}

accounting {
	detail
	unix
	radutmp
	}
session {
	radutmp
}

post-auth {
}
pre-proxy {
}

post-proxy {
	eap
}

*****************************************************************************************

/etc/raddb/users
*****************************************************************************************

DEFAULT	Auth-Type = System
	Fall-Through = 1

DEFAULT		Auth-Type = ldap
		Fall-Through = 1

DEFAULT	Service-Type == Framed-User
	Framed-IP-Address = 255.255.255.254,
	Framed-MTU = 576,
	Service-Type = Framed-User,
	Fall-Through = Yes

DEFAULT	Framed-Protocol == PPP
	Framed-Protocol = PPP,
	Framed-Compression = Van-Jacobson-TCP-IP

DEFAULT	Hint == "CSLIP"
	Framed-Protocol = SLIP,
	Framed-Compression = Van-Jacobson-TCP-IP

DEFAULT	Hint == "SLIP"
	Framed-Protocol = SLIP

*****************************************************************************************

Radius Log:
*****************************************************************************************

Starting - reading configuration files ...
reread_config:  reading radiusd.conf
Config:   including file: /etc/raddb/proxy.conf
Config:   including file: /etc/raddb/clients.conf
Config:   including file: /etc/raddb/snmp.conf
Config:   including file: /etc/raddb/eap.conf
Config:   including file: /etc/raddb/sql.conf
 main: prefix = "/usr"
 main: localstatedir = "/var"
 main: logdir = "/var/log/radius"
 main: libdir = "/usr/lib64"
 main: radacctdir = "/var/log/radius/radacct"
 main: hostname_lookups = no
 main: max_request_time = 30
 main: cleanup_delay = 5
 main: max_requests = 1024
 main: delete_blocked_requests = 0
 main: port = 0
 main: allow_core_dumps = no
 main: log_stripped_names = no
 main: log_file = "/var/log/radius/radius.log"
 main: log_auth = no
 main: log_auth_badpass = no
 main: log_auth_goodpass = no
 main: pidfile = "/var/run/radiusd/radiusd.pid"
 main: user = "radiusd"
 main: group = "radiusd"
 main: usercollide = no
 main: lower_user = "no"
 main: lower_pass = "no"
 main: nospace_user = "no"
 main: nospace_pass = "no"
 main: checkrad = "/usr/sbin/checkrad"
 main: proxy_requests = yes
 proxy: retry_delay = 5
 proxy: retry_count = 3
 proxy: synchronous = no
 proxy: default_fallback = yes
 proxy: dead_time = 120
 proxy: post_proxy_authorize = no
 proxy: wake_all_if_all_dead = no
 security: max_attributes = 200
 security: reject_delay = 1
 security: status_server = no
 main: debug_level = 0
read_config_files:  reading dictionary
read_config_files:  reading naslist
Using deprecated naslist file.  Support for this will go away soon.
read_config_files:  reading clients
read_config_files:  reading realms
radiusd:  entering modules setup
Module: Library search path is /usr/lib64
Module: Loaded exec 
 exec: wait = yes
 exec: program = "(null)"
 exec: input_pairs = "request"
 exec: output_pairs = "(null)"
 exec: packet_type = "(null)"
rlm_exec: Wait=yes but no output defined. Did you mean output=none?
Module: Instantiated exec (exec) 
Module: Loaded expr 
Module: Instantiated expr (expr) 
Module: Loaded LDAP 
 ldap: server = "ldaps://ad-ldap.subdomain.domain.com"
 ldap: port = 636
 ldap: net_timeout = 1
 ldap: timeout = 4
 ldap: timelimit = 3
 ldap: identity = "username"
 ldap: tls_mode = no
 ldap: start_tls = no
 ldap: tls_cacertfile = "(null)"
 ldap: tls_cacertdir = "(null)"
 ldap: tls_certfile = "(null)"
 ldap: tls_keyfile = "(null)"
 ldap: tls_randfile = "(null)"
 ldap: tls_require_cert = "never"
 ldap: password = "password"
 ldap: basedn = "ou=North America,dc=subdomain,dc=domain,dc=com"
 ldap: filter = "(SamAccountName=%u)"
 ldap: base_filter = "(objectclass=*)"
 ldap: default_profile = "(null)"
 ldap: profile_attribute = "(null)"
 ldap: password_header = "{clear}"
 ldap: password_attribute = "userPassword"
 ldap: access_attr = "(null)"
 ldap: groupname_attribute = "cn"
 ldap: groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=
%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=
%{Ldap-UserDn})))"
 ldap: groupmembership_attribute = "(null)"
 ldap: dictionary_mapping = "/etc/raddb/ldap.attrmap"
 ldap: ldap_debug = 40
 ldap: ldap_connections_number = 5
 ldap: compare_check_items = no
 ldap: access_attr_used_for_allow = yes
 ldap: do_xlat = yes
 ldap: 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 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
conns: 0x5555558a41e0
Module: Instantiated ldap (ldap) 
Module: Loaded PAP 
 pap: encryption_scheme = "crypt"
 pap: auto_header = yes
Module: Instantiated pap (pap) 
Module: Loaded CHAP 
Module: Instantiated chap (chap) 
Module: Loaded MS-CHAP 
 mschap: use_mppe = yes
 mschap: require_encryption = no
 mschap: require_strong = no
 mschap: with_ntdomain_hack = no
 mschap: passwd = "(null)"
 mschap: ntlm_auth = "(null)"
Module: Instantiated mschap (mschap) 
Module: Loaded System 
 unix: cache = no
 unix: passwd = "(null)"
 unix: shadow = "(null)"
 unix: group = "(null)"
 unix: radwtmp = "/var/log/radius/radwtmp"
 unix: usegroup = no
 unix: cache_reload = 600
Module: Instantiated unix (unix) 
Module: Loaded eap 
 eap: default_eap_type = "md5"
 eap: timer_expire = 60
 eap: ignore_unknown_eap_types = no
 eap: cisco_accounting_username_bug = no
rlm_eap: Loaded and initialized type md5
rlm_eap: Loaded and initialized type leap
 gtc: challenge = "Password: "
 gtc: auth_type = "PAP"
rlm_eap: Loaded and initialized type gtc
 mschapv2: with_ntdomain_hack = no
rlm_eap: Loaded and initialized type mschapv2
Module: Instantiated eap (eap) 
Module: Loaded preprocess 
 preprocess: huntgroups = "/etc/raddb/huntgroups"
 preprocess: hints = "/etc/raddb/hints"
 preprocess: with_ascend_hack = no
 preprocess: ascend_channels_per_line = 23
 preprocess: with_ntdomain_hack = no
 preprocess: with_specialix_jetstream_hack = no
 preprocess: with_cisco_vsa_hack = no
 preprocess: with_alvarion_vsa_hack = no
Module: Instantiated preprocess (preprocess) 
Module: Loaded realm 
 realm: format = "suffix"
 realm: delimiter = "@"
 realm: ignore_default = no
 realm: ignore_null = no
Module: Instantiated realm (suffix) 
 realm: format = "prefix"
 realm: delimiter = "\"
 realm: ignore_default = no
 realm: ignore_null = no
Module: Instantiated realm (ntdomain) 
Module: Loaded files 
 files: usersfile = "/etc/raddb/users"
 files: acctusersfile = "/etc/raddb/acct_users"
 files: preproxy_usersfile = "/etc/raddb/preproxy_users"
 files: compat = "no"
Module: Instantiated files (files) 
Module: Loaded Acct-Unique-Session-Id 
 acct_unique: key = "User-Name, Acct-Session-Id, NAS-IP-Address,
Client-IP-Address, NAS-Port"
Module: Instantiated acct_unique (acct_unique) 
Module: Loaded detail 
 detail: detailfile =
"/var/log/radius/radacct/%{Client-IP-Address}/detail-%Y%m%d"
 detail: detailperm = 384
 detail: dirperm = 493
 detail: locking = no
Module: Instantiated detail (detail) 
Module: Loaded radutmp 
 radutmp: filename = "/var/log/radius/radutmp"
 radutmp: username = "%{User-Name}"
 radutmp: case_sensitive = yes
 radutmp: check_with_nas = yes
 radutmp: perm = 384
 radutmp: callerid = yes
Module: Instantiated radutmp (radutmp) 
Listening on authentication *:1812
Listening on accounting *:1813
Ready to process requests.
rad_recv: Access-Request packet from host 127.0.0.1:35655, id=159,
length=58
	User-Name = "user1"
	User-Password = "\204\016V\332\226\325\007\347\254Hm\262}B\321M"
	NAS-IP-Address = 255.255.255.255
	NAS-Port = 1
  Processing the authorize section of radiusd.conf
modcall: entering group authorize for request 0
  modcall[authorize]: module "preprocess" returns ok for request 0
rlm_pap: WARNING! No "known good" password found for the user.
Authentication may fail because of this.
  modcall[authorize]: module "pap" returns noop for request 0
  modcall[authorize]: module "chap" returns noop for request 0
  modcall[authorize]: module "mschap" returns noop for request 0
    rlm_realm: No '@' in User-Name = "user1", looking up realm NULL
    rlm_realm: No such realm "NULL"
  modcall[authorize]: module "suffix" returns noop for request 0
    rlm_realm: No '\' in User-Name = "user1", looking up realm NULL
    rlm_realm: No such realm "NULL"
  modcall[authorize]: module "ntdomain" returns noop for request 0
  rlm_eap: No EAP-Message, not doing EAP
  modcall[authorize]: module "eap" returns noop for request 0
    users: Matched entry DEFAULT at line 159
  modcall[authorize]: module "files" returns ok for request 0
modcall: leaving group authorize (returns ok) for request 0
  rad_check_password:  Found Auth-Type ldap
auth: type "LDAP"
  Processing the authenticate section of radiusd.conf
modcall: entering group LDAP for request 0
rlm_ldap: - authenticate
rlm_ldap: login attempt by "user1" with password "??V�?�?��Hm�}B�M"
radius_xlat:  '(SamAccountName=user1)'
radius_xlat:  'ou=North America,dc=subdomain,dc=domain,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 ldaps://ad-ldap.subdomain.domain.com,
authentication 0
rlm_ldap: setting TLS Require Cert to never
rlm_ldap: bind as username/password to
ldaps://ad-ldap.subdomain.domain.com
TLS certificate verification: Error, unable to get local issuer
certificate
rlm_ldap: waiting for bind result ...
request done: ld 0x5555558b2890 msgid 1
rlm_ldap: Bind was successful
rlm_ldap: performing search in ou=North
America,dc=subdomain,dc=domain,dc=com, with filter
(SamAccountName=user1)
request done: ld 0x5555558b2890 msgid 2
rlm_ldap: ldap_release_conn: Release Id: 0
rlm_ldap: user DN: CN=William user1,OU=Users,OU=Headquarters,OU=North
America,DC=subdomain,DC=domain,DC=com
rlm_ldap: (re)connect to ldaps://ad-ldap.subdomain.domain.com,
authentication 1
rlm_ldap: setting TLS Require Cert to never
rlm_ldap: bind as CN=William user1,OU=Users,OU=Headquarters,OU=North
America,DC=subdomain,DC=domain,DC=com/??V�?�?��Hm�}B�M to
ldaps://ad-ldap.subdomain.domain.com
TLS certificate verification: Error, unable to get local issuer
certificate
rlm_ldap: waiting for bind result ...
request done: ld 0x5555558badf0 msgid 1
rlm_ldap: Bind failed with invalid credentials
  modcall[authenticate]: module "ldap" returns reject for request 0
modcall: leaving group LDAP (returns reject) for request 0
auth: Failed to validate the user.
  WARNING: Unprintable characters in the password. ?  Double-check the
shared secret on the server and the NAS!
Delaying request 0 for 1 seconds
Finished request 0
Going to the next request
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Sending Access-Reject of id 159 to 127.0.0.1 port 35655
Waking up in 4 seconds...
--- Walking the entire request list ---
Cleaning up request 0 ID 159 with timestamp 478fad88
Nothing to do.  Sleeping until we see a request.

*****************************************************************************************

William
Segura  |  Product
Development Lab Manager
F5 Networks 

www.f5.com

Freeradius +LDAP + Active Directory + Authenticate Only questions

William Segura