Authenticating against Active Directory using winbind
Paolo Barbato
paolo.barbato at igi.cnr.it
Fri Sep 14 16:21:58 CEST 2018
Christoffer,
have you recently make modification or upgraded your ADs ?
Have you disabled for security reasons NTLMv1 ?
https://support.microsoft.com/en-us/help/2811487/lt2p-ipsec-ras-vpn-connections-fail-when-using-ms-chapv2
Regards,
Paolo.
> On 14 Sep 2018, at 13:43, Christoffer Jönsson <chrjsn at imap.cc> wrote:
>
> Thanks for the response! But it' still not working.
> I'm attaching all of the outputs.
> I also tried using debian 8, 9 and centos 7 as the AD/DC with same errors.
>
> Thanks!
>>
>>> On 11 Sep 2018, at 16:57, Christoffer Jönsson <chrjsn at imap.cc> wrote:
>>>
>>> When I first tried to use freeradius on centos it did not work, but the compile it-yourself-tutorial did :).
>>>
>>> Also, trying to enable pure winbind from repos results in error: "/etc/raddb/mods-enabled/mschap[10]: 'winbind' auth not enabled at compiled time"
>>>
>>> Anyway, I just installed samba + fr from the repos, joined the AD and ran setfacl -m u:radiusd:rx /var/lib/samba/winbindd_privileged.
>>>
>>> Tried both of these:
>>> ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key --username=%{%{Stripped-User-Name}:-%{%{User-Name}:-None}} --domain=auth.chrjsn.se --challenge=%{%{mschap:Challenge}:-00} --nt-response=%{%{mschap:NT-Response}:-00}"
>>> ntlm_auth = "/usr/bin/ntlm_auth --allow-mschapv2 --request-nt-key --username=%{%{Stripped-User-Name}:-%{%{User-Name}:-None}} --domain=auth.chrjsn.se --challenge=%{%{mschap:Challenge}:-00} --nt-response=%{%{mschap:NT-Response}:-00}"
>>>
>>> But they both fail with error:
>>> (0) mschap: ERROR: Program returned code (1) and output 'The attempted logon is invalid. This is either due to a bad username or authentication information. (0xc000006d)'
>>> (0) mschap: External script failed
>>> (0) mschap: ERROR: External script says: The attempted logon is invalid. This is either due to a bad username or authentication information. (0xc000006d)
>>> (0) mschap: ERROR: MS-CHAP2-Response is incorrect
>>>
>>> when this works ntlm_auth --username=adtest --domain=auth.chrjsn.se
>>> Password:
>>> NT_STATUS_OK: The operation completed successfully. (0x0)
>>>
>> Does it work also
>> ntlm_auth --request-nt-key --domain=auth.chrjsn.se --username=adtest
>>
>>
>> In mods-enabled/mschap
>>
>> ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key --username=%{%{Stripped-User-Name}:-%{%{User-Name}:-None}} --challenge=%{%{mschap:Challenge}:-00} --nt-response=%{%{mschap:NT-Response}:-00}"
>>
>> use_mppe = yes
>> require_encryption = yes
>> require_strong = yes
>> authtype = MS-CHAP
>> with_ntdomain_hack = yes
>>
>> I think you've also test
>>
>> kinit adtest
>>
>> and do
>>
>> net ads join -U administrator
>>
>> and nmb winbind and smb are all running
>>
>> and dns resolve auth.chrjsn.se
>>
>>
>> Regards,
>> Paolo.
>>
>>
>>
>>> So now I'm really confused.
>>>> Curious to know why you aren't using samba coming with centos...anyway I've just installed for a new deployment a centos 7.5 + samba 4.7 + freeradius 3.0.13 + winbind against AD: it works !
>>>>
>>>> The suggested command to set in the proper way the privileges of winbindd_privileged directory is setfacl
>>>>
>>>> setfacl -m u:radiusd:rx /var/lib/samba/winbindd_privileged
>>>>
>>>>
>>>> ...radiusd need also x.
>>>>
>>>> Regards,
>>>> Paolo.
>>>>
>>>>
>>>>> On 11 Sep 2018, at 15:54, Christoffer Jönsson <chrjsn at imap.cc> wrote:
>>>>>
>>>>> So I created the radiusd user since there was none created on install and changed the disabled variables to "user = radius group = radius" in radiusd.conf.
>>>>>
>>>>> If I did not run "chgrp radiusd /opt/samba4.2/var/locks/winbindd_privileged" freeradius could not connect to winbind.
>>>>>
>>>>> But when I did chgrp, I still get the same error. There was also no winbind group/user created by default and I don't know which config to set the group/user.
>>>>>
>>>>> I am running CentOS 7.
>>>>>
>>>>> Thanks!
>>>>>
>>>>>
>>>>>> hi,
>>>>>>
>>>>>> check the permissions of the winbindd_privileged directory - might have
>>>>>> been changed when samba patched. (ideally you add radiusd to the winbind
>>>>>> group)
>>>>>>
>>>>>> alan
>>>>>>
>>>>>> On Tue, 11 Sep 2018 at 12:42, Christoffer Jönsson <chrjsn at imap.cc> wrote:
>>>>>>
>>>>>>> Hello! I used this guide a year ago to enable 802.1x on my switches and
>>>>>>> APs and it worked without any problems to authenticate to my Samba4 AD/DC:
>>>>>>>
>>>>>>> https://wiki.freeradius.org/guide/Active-Directory-direct-via-winbind.
>>>>>>>
>>>>>>> Today I am having trouble getting it to work because it wont accept the
>>>>>>> password when running this command or connecting from switches:
>>>>>>>
>>>>>>> "radtest -t mschap adtest Password1 127.0.0.1 0 testing123". And winbind
>>>>>>> returns this result:
>>>>>>>
>>>>>>> "NTLM CRAP authentication for user [auth.chrjsn.se]\[adtest] returned
>>>>>>> NT_STATUS_WRONG_PASSWORD".
>>>>>>>
>>>>>>> But running this command, it authenticates with this result:
>>>>>>>
>>>>>>> ntlm_auth --username=adtest --domain=auth.chrjsn.se
>>>>>>> Password:
>>>>>>> NT_STATUS_OK: Success (0x0):
>>>>>>>
>>>>>>> "Plain-text authentication for user AUTH.CHRJSN.SE\adtest returned
>>>>>>> NT_STATUS_OK (PAM: 0)"
>>>>>>>
>>>>>>> Radiusd reports that password has expired, when it has not. I have reset
>>>>>>> the password for adtest and administrator with same results.
>>>>>>>
>>>>>>> I don't know if there's any new settings or something and I'm really
>>>>>>> stuck here.
>>>>>>>
>>>>>>> It also doesn't matter which version of samba/freeradius I'm using.
>>>>>>>
>>>>>>> Thanks!
>>>>>>>
>>>>>>> -
>>>>>>> List info/subscribe/unsubscribe? See
>>>>>>> http://www.freeradius.org/list/users.html
>>>>>> -
>>>>>> List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
>>>>> -
>>>>> List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
>>>> ------------------------------------------------------------------------------------------------
>>>> Paolo Barbato
>>>>
>>>> Consorzio RFX
>>>> corso Stati Uniti,4
>>>> 35127 Padova - Italy
>>>> Network Administrator
>>>> phone: +39 049 8295097 fax: +39 049 8700718
>>>> ------------------------------------------------------------------------------------------------
>>>>
>>>>
>>>> -
>>>> List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
>>> <debugfile.txt>-
>>> List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
>> ------------------------------------------------------------------------------------------------
>> Paolo Barbato
>>
>> Consorzio RFX
>> <https://www.igi.cnr.it/>corso Stati Uniti,4
>> 35127 Padova - Italy
>> Network Administrator
>> phone: +39 049 8295097 fax: +39 049 8700718
>> ------------------------------------------------------------------------------------------------
>>
>> -
>> List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
>
> <mschap.txt><radius-debugfile.txt><terminal-output.txt><winbind-debugfile.txt>-
> List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
------------------------------------------------------------------------------------------------
Paolo Barbato
Consorzio RFX
<https://www.igi.cnr.it/>corso Stati Uniti,4
35127 Padova - Italy
Network Administrator
phone: +39 049 8295097 fax: +39 049 8700718
------------------------------------------------------------------------------------------------
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