[Freeipa-users] Cross-Realm authentification

[Alexander Bokovoy]

On Thu, 04 Dec 2014, Petr Spacek wrote:
>On 4.12.2014 16:58, Simo Sorce wrote:
>> On Thu, 4 Dec 2014 13:22:01 +0200
>> Alexander Bokovoy <abokovoy at redhat.com> wrote:
>>
>>> On Thu, 04 Dec 2014, Petr Spacek wrote:
>>>>> And /var/log/krb5kdc.log on master.f21.test (KDC for F21.TEST) I
>>>>> can see:
>>>>> Dec 04 12:41:52 master.f21.test krb5kdc[1131](info): bad realm
>>>>> transit path from 'admin at IPA5.TEST' to
>>>>> 'host/master.f21.test at F21.TEST' via '' Dec 04 12:41:52
>>>>> master.f21.test krb5kdc[1131](info): TGS_REQ (6 etypes {18 17 16
>>>>> 23 25 26}) 192.168.5.109: BAD_TRANSIT: authtime 1417689777,
>>>>> admin at IPA5.TEST for host/master.f21.test at F21.TEST, KDC policy
>>>>> rejects request Dec 04 12:41:52 master.f21.test
>>>>> krb5kdc[1131](info): bad realm transit path from 'admin at IPA5.TEST'
>>>>> to 'host/master.f21.test at F21.TEST' via '' Dec 04 12:41:52
>>>>> master.f21.test krb5kdc[1131](info): TGS_REQ (6 etypes {18 17 16
>>>>> 23 25 26}) 192.168.5.109: BAD_TRANSIT: authtime 1417689777,
>>>>> admin at IPA5.TEST for host/master.f21.test at F21.TEST, KDC policy
>>>>> rejects request
>>>>>
>>>>> And this is correct for FreeIPA 3.3 or later because we limit
>>>>> trust to those domains we defined in cn=ad,cn=trusts,$SUFFIX with
>>>>> filter (objectclass=ipaNTTrustedDomain). For the rest we return
>>>>> KRB5KRB_AP_ERR_ILL_CR_TKT error code which is visible as 'KDC
>>>>> policy rejects request'.
>>>>>
>>>>>
>>>>> We may reconsider this check and instead of
>>>>> KRB5KRB_AP_ERR_ILL_CR_TKT return KRB5_PLUGIN_NO_HANDLE to allow
>>>>> fallback to krb5.conf-defined capaths but I remember we had some
>>>>> issues with krb5 versions prior to 1.12 where capaths from
>>>>> krb5.conf were blocking work of the DAL driver.
>>>>
>>>> Alexander, could you open a ticket to prevent us from forgetting
>>>> about it?
>>> I'm not sure yet this is valid. For FreeIPA-FreeIPA trust we'll have a
>>> separate solution and it will be along the lines of existing 'ipa
>>> trust-add' workflow where existing DAL driver code will work as it is.
>>
>> I think we should have a way to relax this requirement, so that people
>> like Andreas can play with kerberos level trusts.
>
>I agree.
Ok, then please file a ticket for this.
The change in the DAL driver will be a single line.
-- 
/ Alexander Bokovoy