Hi all

 

I have been trying to setup an Kerberos and Active Directory setup, Seeing
the same issue you have mentioned in you post (Preauth and ticket
forwarding). I am currently not able to login to a windows machine using a
kerberos user. The Kerberos Server logs show a error [NEEDED_PREAUTH:
<mailto:admin@QA12.INT> admin@QA12.INT for
<mailto:krbtgt/QA12.INT@QA12.INT> krbtgt/QA12.INT@QA12.INT, Additional
pre-authentication required]. 

 

Error from the kerberos server:

 

Sep 06 15:20:14 lhr-qa12 krb5kdc[8654](info): AS_REQ (7 etypes {23 -133
-128 3 1 24 -135}) 10.20.221.180: NEEDED_PREAUTH: admin@QA12.INT for
krbtgt/QA12.INT@QA12.INT, Additional pre-authentication required

Sep 06 15:20:14 lhr-qa12 krb5kdc[8654](info): AS_REQ (2 etypes {3 1})
10.20.221.180: ISSUE: authtime 1315318814, etypes {rep=3 tkt=1 ses=1},
admin@QA12.INT for krbtgt/QA12.INT@QA12.INT

Sep 06 15:20:14 lhr-qa12 krb5kdc[8654](info): TGS_REQ (7 etypes {23 -133
-128 3 1 24 -135}) 10.20.221.180: ISSUE: authtime 1315318814, etypes
{rep=1 tkt=1 ses=1}, admin@QA12.INT for krbtgt/QA10.INT@QA12.INT

Sep 06 15:20:14 lhr-qa12 krb5kdc[8654](info): TGS_REQ (7 etypes {23 -133
-128 3 1 24 -135}) 10.20.221.180: ISSUE: authtime 1315318814, etypes
{rep=1 tkt=16 ses=1}, admin@QA12.INT for
<mailto:host/dmtest.qa10.int@QA12.INT> host/dmtest.qa10.int@QA12.INT

 

Environment: 

-          Kerberos Server(Ubuntu 10.10)

-          AD - Windows 2003 R2

 

Tried to do an Wireshark trace on the communication between the Windows AD
and Kerberos Server, I found that the PA-ENC-TIMESTAMP - data missing,
Could someone let me know if I am missing some configuration information.

 

Regards,

Ranjith.