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Does anyone know how to configure Kerberos with Lion?

It was bad enough that kerberos changed from 10.5 to 10.6, but now they've completely removed MIT Kerberos and replaced it with Heimdal in 10.7. So my existing kerberos configuration, which worked great in 10.6, no longer works in 10.7. This is a real show-stopper for me, until I can find some docs or other information on how to configure OS X as a kerberos client (the KDC is a Red Hat Enterprise Linux box).

Has anyone figured out how to do this? Whenever I try to get a ticket, it tells me that it cannot reach the KDC, but it's failing so fast that I don't think it's even trying to actually talk to my KDC (and I see no traffic to the KDC), so I don't think it knows the address for the KDC. According to the Heimdal manpages and other information, the /etc/krb5.conf file should be where this is defined, and the format should be the same as an MIT Kerberos client, but it just keeps failing miserably.

Any pointers would be highly appreciated!

Posted on Jul 20, 2011 7:54 AM

49 replies

masc88

Level 1

19 points

Jun 25, 2012 11:34 AM in response to tmcmurtr

I only have the default_principal entry in pam.d/authorization (as described above) and a minimum krb5.conf as follows:

[libdefaults]

default_realm = O815.LOCAL

allow_weak_crypto = true

[realms]

O815.LOCAL = {

admin_server = kdc.o81.5

kdc = kdc.o81.5

default_domain = o81.5

}

[domain_realm]

.o81.5 = O815.LOCAL

o81.5 = O815.LOCAL

Using this setup I get a ticket on login automatically (can be shown using klist on console or within ticketviewer) but I don't run a daemon since the ticket usually lasts for my session and for the rare cases it doesn't Im not bothered to run kinit manually.

tmcmurtr

Level 1

9 points

Jun 25, 2012 11:41 AM in response to masc88

I've done the same, other than I've added the renewable option under libdefaults as suggested by mmpestorich. When I try a simple kinit -R after logging in, it errors out on me, which I'm assuming tells me that a renewable ticket isn't being checked out.

masc88

Level 1

19 points

Jun 25, 2012 12:58 PM in response to tmcmurtr

I never checked renewable tickets, without checking in depth I get an error with -R as well

~ n3$ kinit -R

kinit: krb5_get_kdc_cred: TICKET NOT RENEWABLE

sulmanen

Level 1

0 points

Aug 1, 2012 11:53 PM in response to davidbr

10.7.4 authenticating against MS AD. Many thanks, I'm back in business after following your instructions. Samuli

Does anyone know how to configure Kerberos with Lion?