Help with machine authentication

21 Apr 2011

      Hello there,

I've spent the last couple days combing the interwebs, hoping to find
the (probably stupid and minor) config issue with a FreeRADIUS server
I've been asked to implement.  I've successfully enabled and tested user
authentication as a first step, but the next step is to move from that
to machine authentication.  I'll tackle proxying after I can make this
work (hopefully without having to bother the list).

Environment:

CentOS (dmesg gives: Linux version 2.6.18-194.el5
(mockbuild@builder16.centos.org) (gcc version 4.1.2 20080704 (Red Hat
4.1.2-48)) #1 SMP Fri Apr 2 14:58:35 EDT 2010)

Samba v 3.0.33-3.29.el5_5.1

FreeRADIUS Version 2.1.7, for host i686-redhat-linux-gnu, built on Mar
31 2010 at 00:25:31

Problem:

After configuring a Windows XP SP3 supplicant for machine authentication
(which is stupidly complex, given the required registry hacks to make it
work), I get this in the debug output:

++[mschap] returns noop
[ntdomain] No '\' in User-Name = "host/C776669.ppmenergy.us", looking up
realm NULL
[ntdomain] No such realm "NULL"
++[ntdomain] returns noop

Now, I can clearly see that there *is* no '\' in the hostname there, nor
should there be.  But everything I've found on the web indicates that
with the version of FreeRADIUS and Samba I have, %{mschap:User-Name}
should be rewritten as C776669$.  Getting the domain of the thing will
be another challenge of its own, I imagine.

Thank you in advance, for any help you can offer.

-Bob

Following is the complete output of the server startup, and then the
output of a request:

FreeRADIUS Version 2.1.7, for host i686-redhat-linux-gnu, built on Mar
31 2010 at 00:25:31
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/raddb/radiusd.conf
including configuration file /etc/raddb/proxy.conf
including configuration file /etc/raddb/clients.conf
including files in directory /etc/raddb/modules/
including configuration file /etc/raddb/modules/inner-eap
including configuration file /etc/raddb/modules/cui
including configuration file /etc/raddb/modules/acct_unique
including configuration file /etc/raddb/modules/pap
including configuration file /etc/raddb/modules/attr_rewrite
including configuration file /etc/raddb/modules/echo
including configuration file /etc/raddb/modules/unix
including configuration file /etc/raddb/modules/wimax
including configuration file /etc/raddb/modules/mschap
including configuration file /etc/raddb/modules/detail
including configuration file /etc/raddb/modules/pam
including configuration file /etc/raddb/modules/checkval
including configuration file /etc/raddb/modules/perl
including configuration file /etc/raddb/modules/sql_log
including configuration file /etc/raddb/modules/counter
including configuration file /etc/raddb/modules/detail.example.com
including configuration file /etc/raddb/modules/attr_filter
including configuration file /etc/raddb/modules/sradutmp
including configuration file /etc/raddb/modules/etc_group
including configuration file /etc/raddb/modules/smbpasswd
including configuration file /etc/raddb/modules/realm
including configuration file /etc/raddb/modules/mac2vlan
including configuration file /etc/raddb/modules/ntlm_auth
including configuration file /etc/raddb/modules/smsotp
including configuration file /etc/raddb/modules/linelog
including configuration file
/etc/raddb/modules/sqlcounter_expire_on_login
including configuration file /etc/raddb/modules/logintime
including configuration file /etc/raddb/modules/radutmp
including configuration file /etc/raddb/modules/policy
including configuration file /etc/raddb/modules/always
including configuration file /etc/raddb/modules/expiration
including configuration file /etc/raddb/modules/preprocess
including configuration file /etc/raddb/modules/mac2ip
including configuration file /etc/raddb/modules/ippool
including configuration file /etc/raddb/modules/passwd
including configuration file /etc/raddb/modules/digest
including configuration file /etc/raddb/modules/expr
including configuration file /etc/raddb/modules/files
including configuration file /etc/raddb/modules/detail.log
including configuration file /etc/raddb/modules/otp
including configuration file /etc/raddb/modules/exec
including configuration file /etc/raddb/modules/chap
including configuration file /etc/raddb/eap.conf
including configuration file /etc/raddb/policy.conf
including files in directory /etc/raddb/sites-enabled/
including configuration file /etc/raddb/sites-enabled/inner-tunnel
including configuration file /etc/raddb/sites-enabled/default
including configuration file /etc/raddb/sites-enabled/control-socket
group = radiusd
user = radiusd
including dictionary file /etc/raddb/dictionary
main {
        prefix = "/usr"
        localstatedir = "/var"
        logdir = "/var/log/radius"
        libdir = "/usr/lib/freeradius"
        radacctdir = "/var/log/radius/radacct"
        hostname_lookups = no
        max_request_time = 30
        cleanup_delay = 5
        max_requests = 1024
        allow_core_dumps = no
        pidfile = "/var/run/radiusd/radiusd.pid"
        checkrad = "/usr/sbin/checkrad"
        debug_level = 0
        proxy_requests = no
 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 = <secret>
        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 PPMENERGY.US {
 }
 realm PPMENERGY {
 }
 realm LOCAL {
 }
radiusd: #### Loading Clients ####
 client localhost {
        ipaddr = 127.0.0.1
        require_message_authenticator = no
        secret = <secret>
        nastype = "other"
 }
 client 10.56.160.5/32 {
        require_message_authenticator = no
        secret = <secret>
        shortname = "coloPrimary"
        nastype = "cisco"
 }
 client 10.56.160.6/32 {
        require_message_authenticator = no
        secret = <secret>
        shortname = "coloBackup"
        nastype = "cisco"
 }
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: Instantiating ntlm_auth
  exec ntlm_auth {
        wait = yes
        program = "/usr/bin/ntlm_auth --request-nt-key
--username=%{mschap:User-Name} --challenge=%{mschap:Challenge:-00}
--nt-response=%{mschap:NT-Response:-00}
--domain=%{mschap:NT-Domain:-00}"
        input_pairs = "request"
        shell_escape = yes
  }
 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 = yes
        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}
--domain=%{mschap:NT-Domain:-00}"
  }
 Module: Linked to module rlm_unix
 Module: Instantiating unix
  unix {
        radwtmp = "/var/log/radius/radwtmp"
  }
 Module: Linked to module rlm_eap
 Module: Instantiating eap
  eap {
        default_eap_type = "peap"
        timer_expire = 60
        ignore_unknown_eap_types = no
        cisco_accounting_username_bug = no
        max_sessions = 2048
  }
 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/raddb/certs/server.pem"
        certificate_file = "/etc/raddb/certs/server.pem"
        CA_file = "/etc/raddb/certs/ca.pem"
        private_key_password = "whatever"
        dh_file = "/etc/raddb/certs/dh"
        random_file = "/dev/urandom"
        fragment_size = 1024
        include_length = yes
        check_crl = no
        cipher_list = "DEFAULT"
        make_cert_command = "/etc/raddb/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 = yes
        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 ntdomain
  realm ntdomain {
        format = "prefix"
        delimiter = "\"
        ignore_default = no
        ignore_null = no
  }
 Module: Linked to module rlm_files
 Module: Instantiating files
  files {
        usersfile = "/etc/raddb/users"
        acctusersfile = "/etc/raddb/acct_users"
        preproxy_usersfile = "/etc/raddb/preproxy_users"
        compat = "no"
  }
 Module: Checking session {...} for more modules to load
 Module: Linked to module rlm_radutmp
 Module: Instantiating radutmp
  radutmp {
        filename = "/var/log/radius/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/raddb/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/raddb/huntgroups"
        hints = "/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: 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/radius/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/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
 } # 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 = "/var/run/radiusd/radiusd.sock"
 }
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on command file /var/run/radiusd/radiusd.sock
Ready to process requests.

--------------------------------------------

Request output:

rad_recv: Access-Request packet from host 10.56.160.5 port 32768,
id=219, length=214
        User-Name = "host/C776669.ppmenergy.us"
        Calling-Station-Id = "00-1b-77-88-ae-3e"
        Called-Station-Id = "8c-b6-4f-a6-36-80:IBD-Global"
        NAS-Port = 13
        NAS-IP-Address = 10.56.160.5
        NAS-Identifier = "POR-WAPCTL-01"
        Airespace-Wlan-Id = 1
        Service-Type = Framed-User
        Framed-MTU = 1300
        NAS-Port-Type = Wireless-802.11
        Tunnel-Type:0 = VLAN
        Tunnel-Medium-Type:0 = IEEE-802
        Tunnel-Private-Group-Id:0 = "209"
        EAP-Message = 0x020600061900
        State = 0x1c7725f51f713c6d6a5dce719626f316
        Message-Authenticator = 0xf118377d72bb899a7ff3fa3525355301
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[ntdomain] No '\' in User-Name = "host/C776669.ppmenergy.us", looking up
realm NULL
[ntdomain] No such realm "NULL"
++[ntdomain] returns noop
[eap] EAP packet type response id 6 length 6
[eap] Continuing tunnel setup.
++[eap] returns ok
Found Auth-Type = EAP
+- entering group authenticate {...}
[eap] Request found, released from the list
[eap] EAP/peap
[eap] processing type peap
[peap] processing EAP-TLS
[peap] Received TLS ACK
[peap] ACK handshake fragment handler
[peap] eaptls_verify returned 1
[peap] eaptls_process returned 13
[peap] EAPTLS_HANDLED
++[eap] returns handled
Sending Access-Challenge of id 219 to 10.56.160.5 port 32768
        EAP-Message = 0x010700061900
        Message-Authenticator = 0x00000000000000000000000000000000
        State = 0x1c7725f518703c6d6a5dce719626f316
Finished request 14.
Going to the next request
Waking up in 4.9 seconds.

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Help with machine authentication

Eldred, Bob