[Freeipa-users] Cross-Realm authentification

[Simo Sorce]

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.

Simo.

-- 
Simo Sorce * Red Hat, Inc * New York