EAP-TLS User-Name not matching

Huckle Berry huck.berry at gmail.com
Mon Jan 18 22:03:27 CET 2010


So I reverted to the default conf by copying the confs from the source
package. I was forced to alter two lines.
$diff eap.conf /etc/freeradius/eap.conf
155c155
<             private_key_file = ${certdir}/server.pem
---
>             private_key_file = ${certdir}/server.key
$diff users /etc/freeradius/users
49a50,53
> ####################################
> user
> ####################################
>
Other then those changes all confs are at their 'factory defaults'. Yet
still I receive the access-reject packets that started this thread. radiusd
-X output is below. (note: still using default certs)

freeradius -X
FreeRADIUS Version 2.1.8, for host i486-pc-linux-gnu, built on Jan 15 2010
at 23:02:23
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/detail
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/etc_group
including configuration file /etc/freeradius/modules/counter
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/echo
including configuration file
/etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/policy
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/preprocess
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/detail.example.com
including configuration file /etc/freeradius/modules/attr_filter
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/unix
including configuration file /etc/freeradius/modules/detail.log
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/wimax
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/default
including configuration file /etc/freeradius/sites-enabled/inner-tunnel
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 192.168.1.1 {
    ipaddr = 192.168.1.1
    require_message_authenticator = no
    secret = "secret123"
    shortname = "AP"
 }
 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 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/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 = "/etc/freeradius/certs/random"
    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: 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.
rad_recv: Access-Request packet from host 192.168.1.1 port 3078, id=0,
length=145
    User-Name = "user at example.com"
    NAS-IP-Address = 192.168.1.1
    Called-Station-Id = "0016b6e2cc20"
    Calling-Station-Id = "00904b1f9671"
    NAS-Identifier = "0016b6e2cc20"
    NAS-Port = 56
    Framed-MTU = 1400
    NAS-Port-Type = Wireless-802.11
    EAP-Message = 0x020000150175736572406578616d706c652e636f6d
    Message-Authenticator = 0x8daf2ca02316bba446bc8cdbb431725b
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] Looking up realm "example.com" for User-Name = "user at example.com"
[suffix] Found realm "example.com"
[suffix] Adding Stripped-User-Name = "user"
[suffix] Adding Realm = "example.com"
[suffix] Proxying request from user user to realm example.com
[suffix] Preparing to proxy authentication request to realm "example.com"
++[suffix] returns updated
[eap] Request is supposed to be proxied to Realm example.com.  Not doing
EAP.
++[eap] returns noop
++[unix] returns notfound
[files] users: Matched entry user at line 51
++[files] returns ok
++[expiration] returns noop
++[logintime] returns noop
++[pap] returns noop
  WARNING: Empty section.  Using default return values.
Sending Access-Request of id 73 to 127.0.0.1 port 1812
    User-Name = "user"
    NAS-IP-Address = 192.168.1.1
    Called-Station-Id = "0016b6e2cc20"
    Calling-Station-Id = "00904b1f9671"
    NAS-Identifier = "0016b6e2cc20"
    NAS-Port = 56
    Framed-MTU = 1400
    NAS-Port-Type = Wireless-802.11
    EAP-Message = 0x020000150175736572406578616d706c652e636f6d
    Message-Authenticator = 0x00000000000000000000000000000000
    Proxy-State = 0x30
Proxying request 0 to home server 127.0.0.1 port 1812
Sending Access-Request of id 73 to 127.0.0.1 port 1812
    User-Name = "user"
    NAS-IP-Address = 192.168.1.1
    Called-Station-Id = "0016b6e2cc20"
    Calling-Station-Id = "00904b1f9671"
    NAS-Identifier = "0016b6e2cc20"
    NAS-Port = 56
    Framed-MTU = 1400
    NAS-Port-Type = Wireless-802.11
    EAP-Message = 0x020000150175736572406578616d706c652e636f6d
    Message-Authenticator = 0x00000000000000000000000000000000
    Proxy-State = 0x30
Going to the next request
Waking up in 0.9 seconds.
rad_recv: Access-Request packet from host 127.0.0.1 port 1814, id=73,
length=136
    User-Name = "user"
    NAS-IP-Address = 192.168.1.1
    Called-Station-Id = "0016b6e2cc20"
    Calling-Station-Id = "00904b1f9671"
    NAS-Identifier = "0016b6e2cc20"
    NAS-Port = 56
    Framed-MTU = 1400
    NAS-Port-Type = Wireless-802.11
    EAP-Message = 0x020000150175736572406578616d706c652e636f6d
    Message-Authenticator = 0x3819431fccc1316733e3aa053276a579
    Proxy-State = 0x30
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "user", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] EAP packet type response id 0 length 21
[eap] No EAP Start, assuming it's an on-going EAP conversation
++[eap] returns updated
++[unix] returns notfound
[files] users: Matched entry user at line 51
++[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 = EAP
+- entering group authenticate {...}
[eap] Identity does not match User-Name, setting from EAP Identity.
[eap] Failed in handler
++[eap] returns invalid
Failed to authenticate the user.
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> user
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 1 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.
Sending delayed reject for request 1
Sending Access-Reject of id 73 to 127.0.0.1 port 1814
    Proxy-State = 0x30
Waking up in 4.9 seconds.
rad_recv: Access-Reject packet from host 127.0.0.1 port 1812, id=73,
length=23
    Proxy-State = 0x30
+- entering group post-proxy {...}
[eap] No pre-existing handler found
++[eap] returns noop
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> user at example.com
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Sending Access-Reject of id 0 to 192.168.1.1 port 3078
Finished request 0.
Going to the next request
Waking up in 4.9 seconds.
Cleaning up request 1 ID 73 with timestamp +4
Cleaning up request 0 ID 0 with timestamp +4
Ready to process requests.

So much for working 'out-of-the-box'. Certianly this is one of the primary
things that freeradius was built to do and I'm sure there are plenty of
people who have gotten this to work before. I'm sure the an

~Huckle Berry


On Mon, Jan 18, 2010 at 1:53 AM, Alan DeKok <aland at deployingradius.com>wrote:

> Huckle Berry wrote:
> > This was beginning to occur to me. Initially I ignored proxy.conf
> > because i figured I would never need to proxy anything, but I now see FR
> > proxies to itself...
>
>   It treats the inner tunnel session as a (largely) independent RADIUS
> request.  This makes server design && configuration easier.  It also
> means that FreeRADIUS has capabilities that other RADIUS servers don't
> have.
>
> > OK, I just tested this and it resulted in me DoS myself as the request
> > bounced back and forth between 127.0.0.1 and 192.168.1.3. This happened
> > both with my eap.conf and the default eap.conf. Something about there
> > being 200+ Proxy-State attributes.
>
>   So... don't do that.  That proxy loop is *not* in the default
> configuration.  It only happens when you try to force proxying for a
> realm to loop back to the server.
>
>  Why would this *ever* be a good idea?
>
> >     2) in users file you include the details for the user 'user'  eg
> >
> >     user Cleartext-Password := "password"
> >
> >
> > I'm using Certificate based authentication, with myself as the CA, so no
> > password should be needed correct? Or is the Password used to sign the
> > cert needed here?
>
>   No.  You don't need a password.
>
>  Alan DeKok.
> -
> List info/subscribe/unsubscribe? See
> http://www.freeradius.org/list/users.html
>
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