Authenticating groups via LDAP
John Maher
john at chem.umass.edu
Thu May 20 23:44:26 CEST 2010
I really didn't want to post here, but I just can't make any headway
with my radius implementation. I am very new at this and still quite
confused on how the various config files function and interact with each
other. So, I'm not surprised that my implementation is only sort of
working.
I have installed freeradius 2.1.8 on Ubuntu Server 8.04 by making deb
packages from the source and installing the deb packages.
Radius is relying on an LDAP server for authentication of wireless
clients. Only clients with valid usernames and passwords in LDAP will
get authenticated.
What I would really like to do (other than actually be able to
understand the concepts behind the config files) is require clients to
be in a particular LDAP group (e.g., wireless-users) in order to
successfully authenticate. I don't understand how to make that happen.
I've tried creating group filters like this in "modules/ldap":
groupname_attribute = cn
groupmembership_filter =
"(&(objectClass=posixGroup)(memberUid=%{Stripped-User-Name:-%{User-Name}}))"
groupmembership_attribute = memberUid
and this in "users":
DEFAULT LDAP-GROUP == vpn-users
Service-Type = Administrative-User
But the output seems to indicate that it is not even considering my
radiusd.conf config when it comes to the filter. (see output below).
I would so welcome assistance with this. In addition, is there any
resource that is particularly good at explaining how radius and its
config files really works?
Thanks.
John
# freeradius -X
FreeRADIUS Version 2.1.8, for host i486-pc-linux-gnu, built on May 14
2010 at 09:29:10
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/unix
including configuration file /etc/freeradius/modules/detail
including configuration file /etc/freeradius/modules/ldap.dpkg-old
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/attr_filter
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/echo
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/etc_group
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/detail.example.com
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/policy
including configuration file /etc/freeradius/modules/counter
including configuration file
/etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/wimax
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/detail.log
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/preprocess
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 = 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"
}
client 10.12.88.0/23 {
require_message_authenticator = no
secret = "********"
shortname = "ap"
}
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/freeradius/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 = 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
pem_file_type = yes
private_key_file = "/etc/freeradius/certs/radiuskey.pem"
certificate_file = "/etc/freeradius/certs/radiuscert.pem"
CA_file = "/etc/freeradius/certs/cacert.pem"
private_key_password = "********"
dh_file = "/etc/freeradius/certs/dh"
random_file = "/dev/urandom"
fragment_size = 1024
include_length = yes
check_crl = no
cipher_list = "DEFAULT"
make_cert_command = "/etc/freeradius/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/freeradius/users"
acctusersfile = "/etc/freeradius/acct_users"
preproxy_usersfile = "/etc/freeradius/preproxy_users"
compat = "no"
}
Module: Linked to module rlm_ldap
Module: Instantiating ldap
ldap {
server = "auth.chem.umass.edu"
port = 389
password = "*********"
identity = "cn=admin,dc=cns"
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=cns"
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/freeradius/ldap.attrmap"
ldap_debug = 0
ldap_connections_number = 5
compare_check_items = no
do_xlat = yes
edir_account_policy_check = no
set_auth_type = yes
}
rlm_ldap: Registering ldap_groupcmp for Ldap-Group
rlm_ldap: Registering ldap_xlat with xlat_name ldap
rlm_ldap: Over-riding set_auth_type, as there is no module ldap listed
in the "authenticate" section.
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 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: 0x818e078
Module: Checking session {...} for more modules to load
Module: Linked to module rlm_radutmp
Module: Instantiating radutmp
radutmp {
filename = "/var/log/freeradius/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/freeradius/attrs.access_reject"
key = "%{User-Name}"
}
} # modules
} # server
server {
modules {
Module: Checking authenticate {...} for more modules to load
Module: Checking authorize {...} for more modules to load
Module: Linked to module rlm_preprocess
Module: Instantiating preprocess
preprocess {
huntgroups = "/etc/freeradius/huntgroups"
hints = "/etc/freeradius/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/freeradius/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/freeradius/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
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on proxy address * port 1814
Ready to process requests.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
The following displays when a client connects.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
rad_recv: Access-Request packet from host 10.12.88.13 port 2048, id=0,
length=125
User-Name = "jmaher"
NAS-IP-Address = 10.12.88.13
Called-Station-Id = "002129a58514"
Calling-Station-Id = "001cbf31b3b5"
NAS-Identifier = "002129a58514"
NAS-Port = 55
Framed-MTU = 1400
NAS-Port-Type = Wireless-802.11
EAP-Message = 0x0200000b016a6d61686572
Message-Authenticator = 0x97f3c529d6f8cd6d67afdf5fa8a122c2
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "jmaher", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] EAP packet type response id 0 length 11
[eap] No EAP Start, assuming it's an on-going EAP conversation
++[eap] returns updated
++[unix] returns updated
[ldap] Entering ldap_groupcmp()
[files] expand: dc=cns -> dc=cns
[files] WARNING: Deprecated conditional expansion ":-". See "man
unlang" for details
[files] ... expanding second conditional
[files] expand: %{User-Name} -> jmaher
[files] expand: (uid=%{Stripped-User-Name:-%{User-Name}}) ->
(uid=jmaher)
[ldap] ldap_get_conn: Checking Id: 0
[ldap] ldap_get_conn: Got Id: 0
[ldap] attempting LDAP reconnection
[ldap] (re)connect to auth.chem.umass.edu:389, authentication 0
[ldap] bind as cn=admin,dc=cns/**********wcibk at mD to
auth.chem.umass.edu:389
[ldap] waiting for bind result ...
[ldap] Bind was successful
[ldap] performing search in dc=cns, with filter (uid=jmaher)
[ldap] ldap_release_conn: Release Id: 0
[files] expand:
(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))
->
(|(&(objectClass=GroupOfNames)(member=))(&(objectClass=GroupOfUniqueNames)(uniquemember=)))
[ldap] ldap_get_conn: Checking Id: 0
[ldap] ldap_get_conn: Got Id: 0
[ldap] performing search in dc=cns, with filter
(&(cn=vpn-users)(|(&(objectClass=GroupOfNames)(member=))(&(objectClass=GroupOfUniqueNames)(uniquemember=))))
[ldap] object not found
[ldap] ldap_release_conn: Release Id: 0
rlm_ldap::ldap_groupcmp: Group vpn-users not found or user is not a member.
++[files] returns noop
[ldap] performing user authorization for jmaher
[ldap] WARNING: Deprecated conditional expansion ":-". See "man unlang"
for details
[ldap] ... expanding second conditional
[ldap] expand: %{User-Name} -> jmaher
[ldap] expand: (uid=%{Stripped-User-Name:-%{User-Name}}) -> (uid=jmaher)
[ldap] expand: dc=cns -> dc=cns
[ldap] ldap_get_conn: Checking Id: 0
[ldap] ldap_get_conn: Got Id: 0
[ldap] performing search in dc=cns, with filter (uid=jmaher)
[ldap] No default NMAS login sequence
[ldap] looking for check items in directory...
[ldap] sambaNtPassword -> NT-Password ==
0x4537353238434135323632453745303645438324444363635383830453042333
[ldap] sambaLmPassword -> LM-Password ==
0x3743414639453142313632453745303645463337453431343231373532384341
[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] user jmaher authorized to use remote access
[ldap] ldap_release_conn: Release Id: 0
++[ldap] returns ok
++[expiration] returns noop
++[logintime] returns noop
[pap] Normalizing NT-Password from hex encoding
[pap] Normalizing LM-Password from hex encoding
[pap] Found existing Auth-Type, not changing it.
++[pap] returns noop
Found Auth-Type = EAP
+- entering group authenticate {...}
[eap] EAP Identity
[eap] processing type md5
rlm_eap_md5: Issuing Challenge
++[eap] returns handled
Sending Access-Challenge of id 0 to 10.12.88.13 port 2048
EAP-Message = 0x01010016041093940db5446be686982b01b8674bc247
Message-Authenticator = 0x00000000000000000000000000000000
State = 0xa5171280a516162260366d28d5bb6b66
Finished request 0.
Going to the next request
Waking up in 4.9 seconds.
Cleaning up request 0 ID 0 with timestamp +57
Ready to process requests.
More information about the Freeradius-Users
mailing list