RE: Error with AD/freeradius config

15 Jul 2011

      Exec-Program output: Exec-Program: FAILED to execute
/usr/local/etc/raddb/modules/ntlm_auth: Permission denied
Exec-Program-Wait: plaintext: Exec-Program: FAILED to execute
/usr/local/etc/raddb/modules/ntlm_auth: Permission denied

Your path to ntlm auth is wrong.  You need to specify the path to the ntlm auth bin/exe that comes with samba.

G

-----Original Message-----
From: freeradius-users-bounces+ggatten=waddell.com@lists.freeradius.org [mailto:freeradius-users-bounces+ggatten=waddell.com@lists.freeradius.org] On Behalf Of Edge
Sent: Friday, July 15, 2011 9:27 AM
To: freeradius-users@lists.freeradius.org
Subject: Error with AD/freeradius config

OK, sorry as this is a long mail because Im going to include as much config
as possible.
I have been playing around trying to get this to work with little success
though the debug error messages have changed since yesterday
Im having trouble getting freeradius to use ntlm_auth - the error massage is
now stating a permission error..
Just to confirm, Im following the steps on deployingradius.com ..

PAP has been tested and is working
Samba configured and working
wbinfo -a = works, having tested multiple logins
ntlm_auth --request-nt-key --domain=MYDOMAIN --username=user
--password=password = working, again tested with multiple logins
radtest user password localhost 0 testing123 = does not work, see debug info
at end of email..

Contents of/raddb/modules/ntlm_auth file

#
#  For testing ntlm_auth authentication with PAP.
#
#  If you have problems with authentication failing, even when the
#  password is good, it may be a bug in Samba:
#
#       https://bugzilla.samba.org/show_bug.cgi?id=6563
#
exec ntlm_auth {
        wait = yes
        program = "/usr/local/etc/raddb/modules/ntlm_auth --request-nt-key
--domain=xxxxxxxxxx --username=%{mschap:User-Name}
--password=%{User-Password}"
}

I have modified the authenticate sections of the raddb/sites-enabled/default
file, and of the raddb/sites-enabled/inner-tunnel file
Listed below are the authenticate sections only as that is all I have
changed....
sites-enabled/default

authenticate {
        #
        #  PAP authentication, when a back-end database listed
        #  in the 'authorize' section supplies a password.  The
        #  password can be clear-text, or encrypted.
        Auth-Type PAP {
                pap
        }

        #
        #  Most people want CHAP authentication
        #  A back-end database listed in the 'authorize' section
        #  MUST supply a CLEAR TEXT password.  Encrypted passwords
        #  won't work.
        Auth-Type CHAP {
                chap
        }

        #
        #  MSCHAP authentication.
        Auth-Type MS-CHAP {
                mschap
        }

        #  ntlm authentication.

                ntlm_auth

        #  If you have a Cisco SIP server authenticating against
        #  FreeRADIUS, uncomment the following line, and the 'digest'
        #  line in the 'authorize' section.
        digest

        #
        #  Pluggable Authentication Modules.
#       pam

        #
        #  See 'man getpwent' for information on how the 'unix'
        #  module checks the users password.  Note that packets
        #  containing CHAP-Password attributes CANNOT be authenticated
        #  against /etc/passwd!  See the FAQ for details.
        #
        #  For normal "crypt" authentication, the "pap" module should
        #  be used instead of the "unix" module.  The "unix" module should
        #  be used for authentication ONLY for compatibility with legacy
        #  FreeRADIUS configurations.
        #
        unix

        # Uncomment it if you want to use ldap for authentication
        #
        # Note that this means "check plain-text password against
        # the ldap database", which means that EAP won't work,
        # as it does not supply a plain-text password.
#       Auth-Type LDAP {
#               ldap
#       }

        #
        #  Allow EAP authentication.
        eap

        #
        #  The older configurations sent a number of attributes in
        #  Access-Challenge packets, which wasn't strictly correct.
        #  If you want to filter out these attributes, uncomment
        #  the following lines.
        #
#       Auth-Type eap {
#               eap {
#                       handled = 1
#               }
#               if (handled && (Response-Packet-Type == Access-Challenge)) {
#                       attr_filter.access_challenge.post-auth
#                       handled  # override the "updated" code from
attr_filter
#               }
#       }
}
#

raddb/sites-enabled/inner-tunnel file - again just showing the bit
modified..

#
authenticate {
        #
        #  PAP authentication, when a back-end database listed
        #  in the 'authorize' section supplies a password.  The
        #  password can be clear-text, or encrypted.
        Auth-Type PAP {
                pap
        }

        #
        #  Most people want CHAP authentication
        #  A back-end database listed in the 'authorize' section
        #  MUST supply a CLEAR TEXT password.  Encrypted passwords
        #  won't work.
        Auth-Type CHAP {
                chap
        }

        #  MSCHAP authentication.
        Auth-Type MS-CHAP {
                mschap
        }

        #
        #  NTLM authentication.

                ntlm_auth

        #  Pluggable Authentication Modules.
#       pam

        #
        #  See 'man getpwent' for information on how the 'unix'
        #  module checks the users password.  Note that packets
        #  containing CHAP-Password attributes CANNOT be authenticated
        #  against /etc/passwd!  See the FAQ for details.
        #
        unix

        # Uncomment it if you want to use ldap for authentication
        #
        # Note that this means "check plain-text password against
        # the ldap database", which means that EAP won't work,
        # as it does not supply a plain-text password.
#       Auth-Type LDAP {
#               ldap
#       }

        #
        #  Allow EAP authentication.
        eap
}

DEFAULT     Auth-Type = ntlm_auth has been added to the top of the users
file...

Full debug below...

root@istdevlamp10:~# radiusd -X
FreeRADIUS Version 2.1.11, for host x86_64-unknown-linux-gnu, built on Jun
20 2011 at 14:50:11
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 /usr/local/etc/raddb/radiusd.conf
including configuration file /usr/local/etc/raddb/proxy.conf
including configuration file /usr/local/etc/raddb/clients.conf
including files in directory /usr/local/etc/raddb/modules/
including configuration file /usr/local/etc/raddb/modules/krb5
including configuration file /usr/local/etc/raddb/modules/radutmp
including configuration file /usr/local/etc/raddb/modules/digest
including configuration file /usr/local/etc/raddb/modules/logintime
including configuration file /usr/local/etc/raddb/modules/opendirectory
including configuration file /usr/local/etc/raddb/modules/unix
including configuration file /usr/local/etc/raddb/modules/files
including configuration file /usr/local/etc/raddb/modules/sradutmp
including configuration file /usr/local/etc/raddb/modules/sql_log
including configuration file /usr/local/etc/raddb/modules/ntlm_auth
including configuration file /usr/local/etc/raddb/modules/pap
including configuration file /usr/local/etc/raddb/modules/passwd
including configuration file /usr/local/etc/raddb/modules/always
including configuration file /usr/local/etc/raddb/modules/chap
including configuration file /usr/local/etc/raddb/modules/ippool
including configuration file /usr/local/etc/raddb/modules/detail.log
including configuration file /usr/local/etc/raddb/modules/linelog
including configuration file /usr/local/etc/raddb/modules/attr_rewrite
including configuration file /usr/local/etc/raddb/modules/smbpasswd
including configuration file /usr/local/etc/raddb/modules/inner-eap
including configuration file /usr/local/etc/raddb/modules/counter
including configuration file /usr/local/etc/raddb/modules/checkval
including configuration file /usr/local/etc/raddb/modules/mschap
including configuration file /usr/local/etc/raddb/modules/expiration
including configuration file /usr/local/etc/raddb/modules/otp
including configuration file /usr/local/etc/raddb/modules/etc_group
including configuration file /usr/local/etc/raddb/modules/detail
including configuration file /usr/local/etc/raddb/modules/smsotp
including configuration file
/usr/local/etc/raddb/modules/sqlcounter_expire_on_login
including configuration file /usr/local/etc/raddb/modules/soh
including configuration file /usr/local/etc/raddb/modules/wimax
including configuration file /usr/local/etc/raddb/modules/mac2vlan
including configuration file /usr/local/etc/raddb/modules/mac2ip
including configuration file /usr/local/etc/raddb/modules/preprocess
including configuration file /usr/local/etc/raddb/modules/realm
including configuration file /usr/local/etc/raddb/modules/detail.example.com
including configuration file /usr/local/etc/raddb/modules/dynamic_clients
including configuration file /usr/local/etc/raddb/modules/exec
including configuration file /usr/local/etc/raddb/modules/attr_filter
including configuration file /usr/local/etc/raddb/modules/pam
including configuration file /usr/local/etc/raddb/modules/acct_unique
including configuration file /usr/local/etc/raddb/modules/perl
including configuration file /usr/local/etc/raddb/modules/expr
including configuration file /usr/local/etc/raddb/modules/rediswho
including configuration file /usr/local/etc/raddb/modules/echo
including configuration file /usr/local/etc/raddb/modules/policy
including configuration file /usr/local/etc/raddb/modules/replicate
including configuration file /usr/local/etc/raddb/modules/cui
including configuration file /usr/local/etc/raddb/modules/redis
including configuration file /usr/local/etc/raddb/modules/ldap
including configuration file /usr/local/etc/raddb/eap.conf
including configuration file /usr/local/etc/raddb/policy.conf
including files in directory /usr/local/etc/raddb/sites-enabled/
including configuration file /usr/local/etc/raddb/sites-enabled/default
including configuration file /usr/local/etc/raddb/sites-enabled/inner-tunnel
including configuration file
/usr/local/etc/raddb/sites-enabled/control-socket
main {
        allow_core_dumps = no
}
including dictionary file /usr/local/etc/raddb/dictionary
main {
        name = "radiusd"
        prefix = "/usr/local"
        localstatedir = "/usr/local/var"
        sbindir = "/usr/local/sbin"
        logdir = "/usr/local/var/log/radius"
        run_dir = "/usr/local/var/run/radiusd"
        libdir = "/usr/local/lib"
        radacctdir = "/usr/local/var/log/radius/radacct"
        hostname_lookups = no
        max_request_time = 30
        cleanup_delay = 5
        max_requests = 1024
        pidfile = "/usr/local/var/run/radiusd/radiusd.pid"
        checkrad = "/usr/local/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 = 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 {
        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 module "exec" from file
/usr/local/etc/raddb/modules/exec
  exec {
        wait = no
        input_pairs = "request"
        shell_escape = yes
  }
 Module: Linked to module rlm_expr
 Module: Instantiating module "expr" from file
/usr/local/etc/raddb/modules/expr
 Module: Linked to module rlm_expiration
 Module: Instantiating module "expiration" from file
/usr/local/etc/raddb/modules/expiration
  expiration {
        reply-message = "Password Has Expired  "
  }
 Module: Linked to module rlm_logintime
 Module: Instantiating module "logintime" from file
/usr/local/etc/raddb/modules/logintime
  logintime {
        reply-message = "You are calling outside your allowed timespan  "
        minimum-timeout = 60
  }
 }
radiusd: #### Loading Virtual Servers ####
server { # from file /usr/local/etc/raddb/radiusd.conf
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_pap
 Module: Instantiating module "pap" from file
/usr/local/etc/raddb/modules/pap
  pap {
        encryption_scheme = "auto"
        auto_header = no
  }
 Module: Linked to module rlm_chap
 Module: Instantiating module "chap" from file
/usr/local/etc/raddb/modules/chap
 Module: Linked to module rlm_mschap
 Module: Instantiating module "mschap" from file
/usr/local/etc/raddb/modules/mschap
  mschap {
        use_mppe = yes
        require_encryption = no
        require_strong = no
        with_ntdomain_hack = no
        allow_retry = yes
  }
 Module: Instantiating module "ntlm_auth" from file
/usr/local/etc/raddb/modules/ntlm_auth
  exec ntlm_auth {
        wait = yes
        program = "/usr/local/etc/raddb/modules/ntlm_auth --request-nt-key
--domain=london.edu --username=%{mschap:User-Name}
--password=%{User-Password}"
        input_pairs = "request"
        shell_escape = yes
  }
 Module: Linked to module rlm_digest
 Module: Instantiating module "digest" from file
/usr/local/etc/raddb/modules/digest
 Module: Linked to module rlm_unix
 Module: Instantiating module "unix" from file
/usr/local/etc/raddb/modules/unix
  unix {
        radwtmp = "/usr/local/var/log/radius/radwtmp"
  }
 Module: Linked to module rlm_eap
 Module: Instantiating module "eap" from file /usr/local/etc/raddb/eap.conf
  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
        CA_path = "/usr/local/etc/raddb/certs"
        pem_file_type = yes
        private_key_file = "/usr/local/etc/raddb/certs/server.pem"
        certificate_file = "/usr/local/etc/raddb/certs/server.pem"
        CA_file = "/usr/local/etc/raddb/certs/ca.pem"
        private_key_password = "whatever"
        dh_file = "/usr/local/etc/raddb/certs/dh"
        random_file = "/usr/local/etc/raddb/certs/random"
        fragment_size = 1024
        include_length = yes
        check_crl = no
        cipher_list = "DEFAULT"
        make_cert_command = "/usr/local/etc/raddb/certs/bootstrap"
    cache {
        enable = no
        lifetime = 24
        max_entries = 255
    }
    verify {
    }
    ocsp {
        enable = no
        override_cert_url = yes
        url = "http://127.0.0.1/ocsp/"
    }
   }
 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
/usr/local/etc/raddb/modules/preprocess
  preprocess {
        huntgroups = "/usr/local/etc/raddb/huntgroups"
        hints = "/usr/local/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: Linked to module rlm_realm
 Module: Instantiating module "suffix" from file
/usr/local/etc/raddb/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
/usr/local/etc/raddb/modules/files
  files {
        usersfile = "/usr/local/etc/raddb/users"
        acctusersfile = "/usr/local/etc/raddb/acct_users"
        preproxy_usersfile = "/usr/local/etc/raddb/preproxy_users"
        compat = "no"
  }
 Module: Checking preacct {...} for more modules to load
 Module: Linked to module rlm_acct_unique
 Module: Instantiating module "acct_unique" from file
/usr/local/etc/raddb/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
/usr/local/etc/raddb/modules/detail
  detail {
        detailfile =
"/usr/local/var/log/radius/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
  }
 Module: Linked to module rlm_radutmp
 Module: Instantiating module "radutmp" from file
/usr/local/etc/raddb/modules/radutmp
  radutmp {
        filename = "/usr/local/var/log/radius/radutmp"
        username = "%{User-Name}"
        case_sensitive = yes
        check_with_nas = yes
        perm = 384
        callerid = yes
  }
 Module: Linked to module rlm_attr_filter
 Module: Instantiating module "attr_filter.accounting_response" from file
/usr/local/etc/raddb/modules/attr_filter
  attr_filter attr_filter.accounting_response {
        attrsfile = "/usr/local/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
 Module: Instantiating module "attr_filter.access_reject" from file
/usr/local/etc/raddb/modules/attr_filter
  attr_filter attr_filter.access_reject {
        attrsfile = "/usr/local/etc/raddb/attrs.access_reject"
        key = "%{User-Name}"
  }
 } # modules
} # server
server inner-tunnel { # from file
/usr/local/etc/raddb/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 = "control"
 listen {
        socket = "/usr/local/var/run/radiusd/radiusd.sock"
 }
}
listen {
        type = "auth"
        ipaddr = 127.0.0.1
        port = 18120
}
 ... adding new socket proxy address * port 50743
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on command file /usr/local/var/run/radiusd/radiusd.sock
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 43257, id=140,
length=60
        User-Name = "xxxxxxx"
        User-Password = "xxxxxx"
        NAS-IP-Address = 163.119.77.150
        NAS-Port = 0
# Executing section authorize from file
/usr/local/etc/raddb/sites-enabled/default
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
++[digest] returns noop
[suffix] No '@' in User-Name = "xxxxxxx", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] No EAP-Message, not doing EAP
++[eap] returns noop
[files] users: Matched entry DEFAULT at line 1
++[files] 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 = ntlm_auth
# Executing group from file /usr/local/etc/raddb/sites-enabled/default
+- entering group authenticate {...}
[ntlm_auth]     expand: --username=%{mschap:User-Name} -> --username=xxxxxxx
[ntlm_auth]     expand: --password=%{User-Password} -> --password=xxxxxxx
Exec-Program output: Exec-Program: FAILED to execute
/usr/local/etc/raddb/modules/ntlm_auth: Permission denied
Exec-Program-Wait: plaintext: Exec-Program: FAILED to execute
/usr/local/etc/raddb/modules/ntlm_auth: Permission denied
Exec-Program: returned: 1
++[ntlm_auth] returns reject
Failed to authenticate the user.
Using Post-Auth-Type Reject
# Executing group from file /usr/local/etc/raddb/sites-enabled/default
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> xxxxxx
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 8 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.
Sending delayed reject for request 8
Sending Access-Reject of id 140 to 127.0.0.1 port 43257
Waking up in 4.9 seconds.
Cleaning up request 8 ID 140 with timestamp +16484
Ready to process requests.

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RE: Error with AD/freeradius config

Gary Gatten