Trying to get tunneling to work

Mike Bernhardt bernhardt at bart.gov
Wed Dec 16 21:57:07 CET 2009


-----Original Message-----
From: tnt at kalik.net [mailto:tnt at kalik.net] 
Sent: Thursday, December 10, 2009 5:05 PM
To: FreeRadius users mailing list
Subject: Re: Trying to get tunneling to work

> I am trying to set up freeradius to proxy requests 802.11 MSCHAPv2 to an
> IAS
> server. The IAS requests are authenticated by a Safeword server, which
> doesn't support 802.11. So the idea is that freeradius takes the request,
> proxies it to IAS as if it was a non-802.11 client, IAS passes it to the
> integrated Safeword server, and everything is happy.
>
>
>
> My configuration works from a 802.11 supplicant if the user exist locally
> in
> freeradius, but no proxying happens when the user doesn't exist locally.

Read comments in peap section of eap.conf. Replace LOCAL in Proxy-To-Realm
statement in inner-tunnel virtual server with the name of the realm
pointing to IAS server.

Ivan Kalik

As far as I know, this is the case. It is replaced in the users file. I did
a little cleanup on the other config files too. Here is the new output,
though the result is the same.


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
 }
 realm safeword.eng {
        authhost = 192.168.30.29:1812
        accthost = 192.168.30.29:1813
        secret = Testing_Testing
 }
 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
 }
radiusd: #### Loading Clients ####
 client 192.168.7.139/32 {
        require_message_authenticator = no
        secret = "Testing_Testing"
 }
 client 127.0.0.1/32 {
        require_message_authenticator = no
        secret = "testing123"
 }

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 = "/usr/local/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 = "/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
    }
   }
 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 = yes
        use_tunneled_reply = yes
        proxy_tunneled_request_as_eap = no
        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 = "/usr/local/etc/raddb/users"
        acctusersfile = "/usr/local/etc/raddb/acct_users"
        preproxy_usersfile = "/usr/local/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 = "/usr/local/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 = "/usr/local/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 = "/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: 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 =
"/usr/local/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 = "/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
 } # 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"
 }
}
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 proxy address * port 1814
Listening on proxy address 127.0.0.1 port 35452
Ready to process requests.

rad_recv: Access-Request packet from host 192.168.7.139 port 1645, id=148,
length=152
        User-Name = "mbernhardt"
        Framed-MTU = 1400
        Called-Station-Id = "000a.f4e2.2a00"
        Calling-Station-Id = "0021.6a46.b0cc"
        Service-Type = Login-User
        Message-Authenticator = 0x26cd48e5b9fc61664cee336cc1792ccc
        EAP-Message = 0x020700061900
        NAS-Port-Type = Wireless-802.11
        NAS-Port = 3292
        State = 0xc871db2ccc76c2f4ed36eeb8b11d50cb
        NAS-IP-Address = 192.168.7.139
        NAS-Identifier = "lks15w-ap350"
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "mbernhardt", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] EAP packet type response id 7 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 is finished
[peap] eaptls_verify returned 3 
[peap] eaptls_process returned 3 
[peap] EAPTLS_SUCCESS
++[eap] returns handled
Sending Access-Challenge of id 148 to 192.168.7.139 port 1645
        EAP-Message =
0x0108002019001703010015ec4896e2cabf793395eed36c929b08a15179a89940
        Message-Authenticator = 0x00000000000000000000000000000000
        State = 0xc871db2ccd79c2f4ed36eeb8b11d50cb
Finished request 21.
Going to the next request
Waking up in 2.2 seconds.
rad_recv: Access-Request packet from host 192.168.7.139 port 1645, id=149,
length=184
        User-Name = "mbernhardt"
        Framed-MTU = 1400
        Called-Station-Id = "000a.f4e2.2a00"
        Calling-Station-Id = "0021.6a46.b0cc"
        Service-Type = Login-User
        Message-Authenticator = 0x6a4dbd84e5ab9893eeba02d1c466b5f2
        EAP-Message =
0x020800261900170301001be14c477ed7b3337d1f7a595cbfe47a98ceb6bbac01a2b8d714fb
21
        NAS-Port-Type = Wireless-802.11
        NAS-Port = 3292
        State = 0xc871db2ccd79c2f4ed36eeb8b11d50cb
        NAS-IP-Address = 192.168.7.139
        NAS-Identifier = "lks15w-ap350"
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "mbernhardt", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] EAP packet type response id 8 length 38
[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] eaptls_verify returned 7 
[peap] Done initial handshake
[peap] eaptls_process returned 7 
[peap] EAPTLS_OK
[peap] Session established.  Decoding tunneled attributes.
[peap] Identity - mbernhardt
[peap] Got tunneled request
        EAP-Message = 0x0208000f016d6265726e6861726474
server  {
  PEAP: Got tunneled identity of mbernhardt
  PEAP: Setting default EAP type for tunneled EAP session.
  PEAP: Setting User-Name to mbernhardt
Sending tunneled request
        EAP-Message = 0x0208000f016d6265726e6861726474
        FreeRADIUS-Proxied-To = 127.0.0.1
        User-Name = "mbernhardt"
        Framed-MTU = 1400
        Called-Station-Id = "000a.f4e2.2a00"
        Calling-Station-Id = "0021.6a46.b0cc"
        Service-Type = Login-User
        NAS-Port-Type = Wireless-802.11
        NAS-Port = 3292
        NAS-IP-Address = 192.168.7.139
        NAS-Identifier = "lks15w-ap350"
server inner-tunnel {
+- entering group authorize {...}
++[chap] returns noop
++[mschap] returns noop
++[unix] returns updated
[suffix] No '@' in User-Name = "mbernhardt", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
++[control] returns noop
[eap] Request is supposed to be proxied to Realm LOCAL.  Not doing EAP.
++[eap] returns noop
[files] users: Matched entry DEFAULT at line 3
++[files] returns ok
++[expiration] returns noop
++[logintime] returns noop
++[pap] returns noop
} # server inner-tunnel
[peap] Got tunneled reply code 0
  PEAP: Calling authenticate in order to initiate tunneled EAP session.
+- entering group authenticate {...}
[eap] EAP Identity
[eap] processing type mschapv2
rlm_eap_mschapv2: Issuing Challenge
++[eap] returns handled
    PEAP: Cancelling proxy to realm safeword.eng until the tunneled EAP
session has been established
[peap] Got tunneled reply RADIUS code 11
        EAP-Message =
0x010900241a0109001f10421fda5c741f99bbbd660650209f40a16d6265726e6861726474
        Message-Authenticator = 0x00000000000000000000000000000000
        State = 0x3dd5fbf33ddce1440d05495c582e500e
[peap] Got tunneled Access-Challenge
++[eap] returns handled
Sending Access-Challenge of id 149 to 192.168.7.139 port 1645
        EAP-Message = 

0x0109003b190017030100307e4b0e6a672924f75bbb213a62d8e08842877ff9e84d690b7bf5
5531e4eced9572a2c0f4f230db301d3

ac0e43d4ec15e
        Message-Authenticator = 0x00000000000000000000000000000000
        State = 0xc871db2cce78c2f4ed36eeb8b11d50cb
Finished request 22.
Going to the next request
Waking up in 2.2 seconds.
rad_recv: Access-Request packet from host 192.168.7.139 port 1645, id=150,
length=238
        User-Name = "mbernhardt"
        Framed-MTU = 1400
        Called-Station-Id = "000a.f4e2.2a00"
        Calling-Station-Id = "0021.6a46.b0cc"
        Service-Type = Login-User
        Message-Authenticator = 0x29cb8c7c5e0ea13931129b5404267fbd
        EAP-Message = 

0x0209005c19001703010051da572ed9a75ebdddd39a40408f8c6eb4f537f65470fba05b8b82
c174224dcd6de968b259232794f361d

51ab246ab8b41b50bd8dac1777fc412c4f78b4015250d700441464b71f7c27aa6c3901adfff3
1a7
        NAS-Port-Type = Wireless-802.11
        NAS-Port = 3292
        State = 0xc871db2cce78c2f4ed36eeb8b11d50cb
        NAS-IP-Address = 192.168.7.139
        NAS-Identifier = "lks15w-ap350"
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "mbernhardt", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] EAP packet type response id 9 length 92
[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] eaptls_verify returned 7 
[peap] Done initial handshake
[peap] eaptls_process returned 7 
[peap] EAPTLS_OK
[peap] Session established.  Decoding tunneled attributes.
[peap] EAP type mschapv2
[peap] Got tunneled request
        EAP-Message = 

0x020900451a0209004031b326572c085e1b042802b27f632ddc860000000000000000914fa3
c6b927312212cb1ae7675131d7f1a75

7e2a0deaeab006d6265726e6861726474
server  {
  PEAP: Setting User-Name to mbernhardt
Sending tunneled request
        EAP-Message = 

0x020900451a0209004031b326572c085e1b042802b27f632ddc860000000000000000914fa3
c6b927312212cb1ae7675131d7f1a75

7e2a0deaeab006d6265726e6861726474
        FreeRADIUS-Proxied-To = 127.0.0.1
        User-Name = "mbernhardt"
        State = 0x3dd5fbf33ddce1440d05495c582e500e
        Framed-MTU = 1400
        Called-Station-Id = "000a.f4e2.2a00"
        Calling-Station-Id = "0021.6a46.b0cc"
        Service-Type = Login-User
        NAS-Port-Type = Wireless-802.11
        NAS-Port = 3292
        NAS-IP-Address = 192.168.7.139
        NAS-Identifier = "lks15w-ap350"
server inner-tunnel {
+- entering group authorize {...}
++[chap] returns noop
++[mschap] returns noop
++[unix] returns updated
[suffix] No '@' in User-Name = "mbernhardt", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
++[control] returns noop
[eap] Request is supposed to be proxied to Realm LOCAL.  Not doing EAP.
++[eap] returns noop
[files] users: Matched entry DEFAULT at line 3
++[files] returns ok
++[expiration] returns noop
++[logintime] returns noop
++[pap] returns noop
} # server inner-tunnel
[peap] Got tunneled reply code 0
  PEAP: Calling authenticate in order to initiate tunneled EAP session.
+- entering group authenticate {...}
[eap] Request found, released from the list
[eap] EAP/mschapv2
[eap] processing type mschapv2
[eap]   Not-EAP proxy set.  Not composing EAP
++[eap] returns handled
  PEAP: Tunneled authentication will be proxied to safeword.eng
  PEAP: Remembering to do EAP-MS-CHAP-V2 post-proxy.
[eap]   Tunneled session will be proxied.  Not doing EAP.
++[eap] returns handled
  WARNING: Empty section.  Using default return values.
ERROR: Failed to create a new socket for proxying requests.
ERROR: Failed inserting request into proxy hash.
ERROR: Failed to proxy request 23
There was no response configured: rejecting request 23
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> mbernhardt
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 23 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.




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