Help authenticating to Active Directory
Jarett DeAngelis
jarett at bioteam.net
Sun Sep 3 19:12:42 CEST 2017
Hi folks,
I am trying to set up FreeRADIUS such that it can authenticate users for OpenVPN via Active Directory and pass a challenge back for a one-time passcode for two-factor authentication. Step one is getting AD authentication working, which appears to work fine when I do an ntlm_auth check except that FreeRADIUS denies the login. Can someone help me figure out what I’m doing wrong?
Here is a log of a radtest login:
root at endor:~# cat output.txt
freeradius: FreeRADIUS Version 2.2.8, for host x86_64-pc-linux-gnu, built on Jul 26 2017 at 15:27:21
Copyright (C) 1999-2015 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.
For more information about these matters, see the file named COPYRIGHT.
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/policy
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/dynamic_clients
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/opendirectory
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/wimax
including configuration file /etc/freeradius/modules/counter
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/detail
including configuration file /etc/freeradius/modules/detail.example.com <http://detail.example.com/>
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/redis
including configuration file /etc/freeradius/modules/etc_group
including configuration file /etc/freeradius/modules/detail.log
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/cache
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/rediswho
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/echo
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/unix
including configuration file /etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/soh
including configuration file /etc/freeradius/modules/dhcp_sqlippool
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/radrelay
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/preprocess
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/replicate
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/modules/attr_filter
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 {
name = "freeradius"
prefix = "/usr"
localstatedir = "/var"
sbindir = "/usr/sbin"
logdir = "/var/log/freeradius"
run_dir = "/var/run/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
allow_vulnerable_openssl = no
}
}
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
coa {
irt = 2
mrt = 16
mrc = 5
mrd = 30
}
}
home_server_pool my_auth_failover {
type = fail-over
home_server = localhost
}
realm example.com <http://example.com/> {
auth_pool = my_auth_failover
}
realm LOCAL {
}
radiusd: #### Loading Clients ####
client localhost {
ipaddr = 127.0.0.1
require_message_authenticator = no
secret = "fakesecret"
nastype = "other"
}
client 10.6.6.42 {
require_message_authenticator = no
secret = "fakesecret"
shortname = "VPN"
}
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
timeout = 10
}
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: Creating Auth-Type = digest
Module: Checking authenticate {...} for more modules to load
Module: Linked to module rlm_pap
Module: Instantiating module "pap" from file /etc/freeradius/modules/pap
pap {
encryption_scheme = "auto"
auto_header = no
}
Module: Linked to module rlm_chap
Module: Instantiating module "chap" from file /etc/freeradius/modules/chap
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 = no
allow_retry = yes
}
Module: Linked to module rlm_digest
Module: Instantiating module "digest" from file /etc/freeradius/modules/digest
Module: Linked to module rlm_unix
Module: Instantiating module "unix" from file /etc/freeradius/modules/unix
unix {
radwtmp = "/var/log/freeradius/radwtmp"
}
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 = 1024
}
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"
CA_file = "/etc/freeradius/certs/ca.pem"
private_key_password = "whatever"
dh_file = "/etc/freeradius/certs/dh"
random_file = "/dev/urandom"
fragment_size = 1024
include_length = yes
check_crl = no
check_all_crl = no
cipher_list = "DEFAULT"
make_cert_command = "/etc/freeradius/certs/bootstrap"
ecdh_curve = "prime256v1"
cache {
enable = no
lifetime = 24
max_entries = 255
}
verify {
}
ocsp {
enable = no
override_cert_url = yes
url = "http://127.0.0.1/ocsp/ <http://127.0.0.1/ocsp/>"
use_nonce = yes
timeout = 0
softfail = no
}
}
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"
soh = no
}
Module: Linked to sub-module rlm_eap_mschapv2
Module: Instantiating eap-mschapv2
mschapv2 {
with_ntdomain_hack = no
send_error = no
}
Module: Checking authorize {...} for more modules to load
Module: Linked to module rlm_preprocess
Module: Instantiating module "preprocess" from file /etc/freeradius/modules/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
}
reading pairlist file /etc/freeradius/huntgroups
reading pairlist file /etc/freeradius/hints
Module: Instantiating module "ntlm_auth" from file /etc/freeradius/modules/ntlm_auth
exec ntlm_auth {
wait = yes
program = "/usr/bin/ntlm_auth --request-nt-key --domain=CLAB --username=%{mschap:User-Name} --password=%{User-Password}"
input_pairs = "request"
shell_escape = yes
}
Module: Checking preacct {...} for more modules to load
Module: Linked to module rlm_acct_unique
Module: Instantiating module "acct_unique" from file /etc/freeradius/modules/acct_unique
acct_unique {
key = "User-Name, Acct-Session-Id, NAS-IP-Address, NAS-Identifier, NAS-Port"
}
Module: Linked to module rlm_realm
Module: Instantiating module "suffix" from file /etc/freeradius/modules/realm
realm suffix {
format = "suffix"
delimiter = "@"
ignore_default = no
ignore_null = no
}
Module: Linked to module rlm_files
Module: Instantiating module "files" from file /etc/freeradius/modules/files
files {
usersfile = "/etc/freeradius/users"
acctusersfile = "/etc/freeradius/acct_users"
preproxy_usersfile = "/etc/freeradius/preproxy_users"
compat = "no"
}
reading pairlist file /etc/freeradius/users
reading pairlist file /etc/freeradius/acct_users
reading pairlist file /etc/freeradius/preproxy_users
Module: Checking accounting {...} for more modules to load
Module: Linked to module rlm_detail
Module: Instantiating module "detail" from file /etc/freeradius/modules/detail
detail {
detailfile = "/var/log/freeradius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/detail-%Y%m%d"
header = "%t"
detailperm = 384
dirperm = 493
locking = no
log_packet_header = no
escape_filenames = no
}
Module: Linked to module rlm_attr_filter
Module: Instantiating module "attr_filter.accounting_response" from file /etc/freeradius/modules/attr_filter
attr_filter attr_filter.accounting_response {
attrsfile = "/etc/freeradius/attrs.accounting_response"
key = "%{User-Name}"
relaxed = no
}
reading pairlist file /etc/freeradius/attrs.accounting_response
Module: Checking session {...} for more modules to load
Module: Linked to module rlm_radutmp
Module: Instantiating module "radutmp" from file /etc/freeradius/modules/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: Instantiating module "attr_filter.access_reject" from file /etc/freeradius/modules/attr_filter
attr_filter attr_filter.access_reject {
attrsfile = "/etc/freeradius/attrs.access_reject"
key = "%{User-Name}"
relaxed = no
}
reading pairlist file /etc/freeradius/attrs.access_reject
} # modules
} # server
server inner-tunnel { # from file /etc/freeradius/sites-enabled/inner-tunnel
modules {
Module: Checking authenticate {...} for more modules to load
Module: Checking authorize {...} for more modules to load
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 = "auth"
ipaddr = 127.0.0.1
port = 18120
}
... adding new socket proxy address * port 57592
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on authentication address 127.0.0.1 port 18120 as server inner-tunnel
Listening on proxy address * port 1814
Ready to process requests.
rad_recv: Access-Request packet from host 127.0.0.1 port 46192, id=160, length=92
User-Name = "fakeuser"
User-Password = "fakepassword"
NAS-IP-Address = 10.6.6.43
NAS-Port = 0
Message-Authenticator = 0x7c3060d6de1f607926e789d4d00f3afc
# Executing section authorize from file /etc/freeradius/sites-enabled/default
+group authorize {
++[preprocess] = ok
[ntlm_auth] expand: --username=%{mschap:User-Name} -> --username=fakeuser
[ntlm_auth] expand: --password=%{User-Password} -> --password=fakepassword
Exec output: NT_STATUS_OK: Success (0x0)
Exec plaintext: NT_STATUS_OK: Success (0x0)
[ntlm_auth] Exec: program returned: 0
++[ntlm_auth] = ok
[eap] No EAP-Message, not doing EAP
++[eap] = noop
++[expiration] = noop
++[logintime] = noop
[pap] WARNING! No "known good" password found for the user. Authentication may fail because of this.
++[pap] = noop
+} # group authorize = ok
ERROR: No authenticate method (Auth-Type) found for the request: Rejecting the user
Failed to authenticate the user.
Using Post-Auth-Type Reject
# Executing group from file /etc/freeradius/sites-enabled/default
+group REJECT {
[eap] Request didn't contain an EAP-Message, not inserting EAP-Failure
++[eap] = noop
[attr_filter.access_reject] expand: %{User-Name} -> fakeuser
attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] = updated
+} # group REJECT = updated
Delaying reject of request 0 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.
Sending delayed reject for request 0
Sending Access-Reject of id 160 to 127.0.0.1 port 46192
Waking up in 4.9 seconds.
Cleaning up request 0 ID 160 with timestamp +7
Ready to process requests.
Ready to process requests.
Signalled to terminate
Exiting normally.
TIA.
Jarett
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