[Freeipa-users] Using external KDC

[Dmitri Pal]

On 03/03/2014 07:47 PM, Simo Sorce wrote:
> On Mon, 2014-03-03 at 18:42 -0600, Trey Dockendorf wrote:
>> Is it possible with FreeIPA to use an external KDC or pass some or all
>> authentication to an external KDC?  The KDC at our University may give
>> me a one way trust if I describe my implementation plan for FreeIPA.
>> Currently I use 389DS with PAM pass through using untrusted pam_krb5.
>> I'd like to fully utilize FreeIPA without managing passwords since all
>> my users already have University accounts.  I just want to manage
>> authorization for my systems, not authentication.
> You could set up a kerberos trust manually but at the moment we do not
> support it in the code or the utilities.
>
> SSSD in particular will have no place to find identity information if
> all you have is a kerberos trust, you'd need also an external identity
> store to point to, but there is no builtin code in SSSD to link the 2
> domain at this point.
>
> We are planning on working on IPA-to-IPA trust, and possibly
> IPA-to-*other* so any requirements you can throw at us will be made part
> of the consideration and planning to add this kind of functionality in
> the future.
>
> NM B HTH,
> Simo.
>
Can you describe your workflows because I have some idea in mind?
Would you be OK if your accounts would be in IPA but the authentication 
would be proxied out?

The idea is that you can use OTP RADIUS capability to proxy passwords to 
your main KDC.

client ---OTP---> IPA ---> OTP Proxy ---> RADIUS ---> Your KDC

Disclaimer: that would defeat the purpose of Kerberos and the password 
will be sent over the wire but it seems that you are already in this setup.

Would you be interested to give it a try?
Would require latest SSSD and kerberos library on the client though but 
would work with LDAP binds too.


-- 
Thank you,
Dmitri Pal

Sr. Engineering Manager for IdM portfolio
Red Hat Inc.


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