[28731] in Kerberos

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Enabling preauthentication on linux kdc

daemon@ATHENA.MIT.EDU (sgouris@gmail.com)
Wed Nov 14 07:30:14 2007

From: sgouris@gmail.com
Date: Wed, 14 Nov 2007 12:15:19 -0000
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Hi,

I have a question regarding enabling kerberos pre-authentication on
linux kdc (kerberos servers). Can somebody please help ? I am not able
to enable this preauthentication on linux kdc.

windows kdc works with preauthencation enabled, such that even if a
kerberos request comes from linux machine the kdc returns KRB-ERROR.
the linux kerberos client then comes back with the required PA-ENC-
TIMESTAMP and is authenticated by KDC. I would like to configure linux
kdc for the same behaviour.

for this on the linux kerberos kdc machine.
I edited /var/kerberos/krb5kdc/kdc.conf
and put this lines

[realms]
NEVISTEST.COM = {
require-preauth = yes
default_principal_flags = +preauth
....

and restarted krb5kdc service
but this doesn't seem to effect the kerberos behaviour in any way and
I am stuck.

please help me with any suggestion/pointers.

Regards
S.Gourisankar

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