PEAP/MSCHAPv2 - Host Account Authentication Only

25 Apr 2012

      I have a working setup using FreeRadius 2.1.10 doing PEAP/MSCHAPv2 against a 2008 R2 Domain Controller via Samba 2.3.5.6 all running on Debian 6.0.4. My clients are D-Link DWL3200 and D-Link DAP-2360 access points. I am using the builtin Windows XP SP3 802.1x supplicant.

Currently FreeRadius will send back Access-Accepts for *both* user and machine/host accounts (in the Active Directory context of those terms). I would like to configure FreeRadius to ignore or reject authentication requests using the user creditionals. I spent the better part of yesterday afternoon searching the mailing list but I couldn't seem to conjure up the correct search terms to find out which configuration files I need to delve into to make this setting.

My goal is to implement 802.1x authentication for devices that are joined to the domain. I don't want people to be able to use their domain creditionals to authenticate non-domain devices to our wireless network.

Additionally, I just want to commend the developers and other folks associated with FreeRadius for a fantastic job. The configuration files are very well documented, I just can't figure out which one I need to re-read.

Thanks.

Debugging Output:
-----------------

FreeRADIUS Version 2.1.10, for host x86_64-pc-linux-gnu, built on Nov 14 2010 at 21:12:30
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/etc_group
including configuration file /etc/freeradius/modules/opendirectory
including configuration file /etc/freeradius/modules/dynamic_clients
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/preprocess
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/detail.example.com
including configuration file /etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/attr_filter
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/modules/unix
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/counter
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/policy
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/wimax
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/echo
including configuration file /etc/freeradius/modules/detail
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/detail.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 = yes
 log {
	stripped_names = no
	auth = yes
	auth_badpass = yes
	auth_goodpass = yes
 }
 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 192.168.41.9 {
	require_message_authenticator = no
	secret = ""
	shortname = "cshop-dap2360-wap"
	nastype = "other"
 }
 client 192.168.52.0/22 {
	require_message_authenticator = no
	secret = ""
	shortname = "cbj-downtown"
	nastype = "other"
 }
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 inner-tunnel { # from file /etc/freeradius/sites-enabled/inner-tunnel
 modules {
 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 = yes
	with_ntdomain_hack = yes
	ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key --username=%{mschap:User-Name} --challenge=%{mschap:Challenge:-00} --nt-response=%{mschap:NT-Response:-00}"
  }
 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 = "peap"
	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"
	CA_file = "/etc/freeradius/certs/ca.pem"
	private_key_password = "SECRET"
	dh_file = "/etc/freeradius/certs/dh"
	random_file = "/dev/urandom"
	fragment_size = 1024
	include_length = yes
	check_crl = no
	cipher_list = "DEFAULT"
    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
	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 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"
  }
 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: Linked to module rlm_attr_filter
 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}"
  }
 } # modules
} # server
server { # from file /etc/freeradius/radiusd.conf
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_digest
 Module: Instantiating module "digest" from file /etc/freeradius/modules/digest
 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
  }
 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, Client-IP-Address, NAS-Port"
  }
 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/%{Client-IP-Address}/detail-%Y%m%d"
	header = "%t"
	detailperm = 384
	dirperm = 493
	locking = no
	log_packet_header = no
  }
 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}"
  }
 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
}
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.

-- 
Kevin Elliott

Network Specialist
City and Borough of Juneau, MIS
(907) 586 - 0905