pamkrbval: KDC policy rejects request for this entry

Wed Aug 27 15:35:11 EDT 2008

I can get and provide the AS_REQ and AS_REP details tomorrow...
I have removed all the lifetime entries and tried with having enctypes
of just RC4-HMAC, and also having RC4-HMAC, DES-CBC-CRC

One thing about the time differences.. the HPUX host is on GMT, but
the AD host is on BST... so the clocks are both 1 hour apart (exactly
1 hour)..
Unfortunately the UNIX hosts ave to remain on GMT year round.
I assume the actual timezone shift is not an issue here ?

kinit unix_client prompts for the password then returns with "KDC
policy rejects request while getting initial credentials"

On Wed, Aug 27, 2008 at 7:30 PM, Markus Moeller <huaraz at moeller.plus.com> wrote:
> Can you check that AD and your HP system are time synchronised ?  Can you do
> a kinit unix_client with the correct password ? Do you have the kvno binary
> on the HP platform ? If so can you do a kvno
> host/unix_client.domain.host.com and compare the number with the one in the
> keytab ?
>
> Do you have the AS_REQ and AS_REP details (e.g. a wireshark capture) ?
>
> Regards
> Markus
>
>
> <ricurtis at gmail.com> wrote in message
> news:fb4cbb61-7eef-419a-a7ba-61c2bb3ce668 at 56g2000hsm.googlegroups.com...
> I have tried everyones suggestions, but no joy - although I think I
> can narrow down the problem somewhat...
>
> After changing the default_t*_enctypes to be "RC4-HMAC" (and also
> removing the lines altogether), I still get the same error...
>
> In the Windows security log on the domain controller, I have a Failure
> Audit with a result code from the request of 0xC which from some
> searching at Microsoft suggests:
>    Requested start time is later than end time
> or Workstation login restrictions..
>
> >From a packet capture using Wireshark, the AS-REQ packet there is an
> entry "till: 1970-01-01 00:00:00 (UTC)"
> It looks as though the requested lifetime of the packet here is in the
> past...
>
> Any suggestions around that?
>
> Regards
>
> Richard
>
>
>
> On 26 Aug, 20:32, "Richard Curtis" <ricur... at gmail.com> wrote:
>> According to the HP release notes (I have Kerberos Client C.1.3.5.05):
>>
>> The client libraries are based on MIT Kerberos V5 1.3.5 release. The
>> KRB5-Client libraries support DES, 3DES, RC4, and AES, as specified in
>> RFC 1510 of the IETF. This release of Kerberos Client is interoperable
>> with Microsoft Windows 2000 and 2003.
>>
>> I will try tomorrow when I am back in the office by setting the
>> default_*_enctypes to RC4-HMAC... the strange thing is, the HP
>> configuration guide I am following has a sample krb5.conf and only
>> mentions DES...http://docs.hp.com/en/J4269-90076/index.html- there
>> is no mention of RC4 in the whole document.
>> I will try removing default_*_enctypes altogether aswell, and failing
>> that, will have a go with DEC encryption only..
>>
>> If this turns out to be the solution, I will be over the moon... this
>> has been dragging on for some time :)
>>
>> I will post back tomorrow with my results.. thanks for the replies so far
>> guys.
>>
>> Regards
>>
>> Richard
>>
>>
>>
>> On Tue, Aug 26, 2008 at 8:00 PM, Markus Moeller <hua... at moeller.plus.com>
>> wrote:
>> > Two comments. Firstly use RC4 (e.g. RC4-HMAC) not DES in your
>> > configuration
>> > assuming you have a MIT Kerberos version > 1.3 (is HPUX 11i still based
>> > on
>> > MIT 1.1.1 ?). If not you need to set the AD entry for unix_client to be
>> > DES
>> > only. Secondly did you change the password of the unix_client user ? If
>> > not
>> > please try to change the password once and re-extract the keytab.
>>
>> > Markus
>>
>> > "Richard Curtis" <ricur... at gmail.com> wrote in message
>> >news:5745a7060808261135s26134f5bg495452c33920af1f at mail.gmail.com...
>> >> Hi,
>> >> I am trying to get an HPUX 11i box to authenticate against our
>> >> active directory (Windows 2003r2) domain with kerberos but I am
>> >> getting nowhere fast.
>>
>> >> As per the docs I have, I have created a user account in active
>> >> directory, then used "ktpass -princ
>> >> host/unix_client.domain.host.... at DOMAIN.HOST.COM -mapuser unix_lient
>> >> -pass <pass> -out c:\krb5.keytab"
>> >> The keytab looks fine when I used ktutil, but I cannot do a kinit... I
>> >> keep getting "KDC policy rejects request for this entry"
>>
>> >> I am guessing this is more of a Windows/AD config issue, but thougt
>> >> someone here might have seen this?
>>
>> >> cat /etc/krb5.conf
>> >> [libdefaults]
>> >> default_realm = DOMAIN.HOST.COM
>> >> default_tgs_enctypes = DES-CBC-CRC
>> >> default_tkt_enctypes = DES-CBC-CRC
>> >> ccache_type = 2
>> >> ticket_liftetime = 24000
>> >> #dns_lookup_kdc = true
>>
>> >> [realms]
>> >> DOMAIN.HOST.COM = {
>> >> kdc = 2003_dc.domain.host.com
>> >> kpasswd_server = 2003_dc.domain.host.com:464
>> >> }
>>
>> >> [domain_realm]
>> >> domain.host.com = DOMAIN.HOST.COM
>> >> .domain.host.com = DOMAIN.HOST.COM
>>
>> >> [logging]
>> >> default = FILE:/var/adm/krb5lib.log
>> >> kdc = FILE:/var/adm/krb5kdc.log
>> >> admin_server = FILE:/var/adm/kKDCmind.log
>>
>> >> [appdefaults]
>> >> pam = {
>> >> debug = false
>> >> ticket_lifetime = 36000
>> >> renew_lifetime = 36000
>> >> forwardable = true
>> >> krb4_convert = false
>> >> }
>>
>> >> unix_client:/var/adm/syslog >pamkrbval -v
>>
>> >> Validating the pam configuration files
>> >> ---------- --- --- ------------- -----
>>
>> >> Validating the /etc/pam.conf file
>> >> [LOG] : The /etc/pam.conf files permissions are fine
>> >> [LOG] : Opened : /etc/pam.conf
>>
>> >> [PASS] : The validation of config file: /etc/pam.conf passed
>>
>> >> [NOTICE] : The validation of config file: /etc/pam_user.conf is not
>> >> done
>> >> as libpam_updbe library is not configured
>>
>> >> Validating the kerberos config file
>> >> ---------- --- -------- ------ -----
>> >> [PASS] : Initialization of kerberos passed
>>
>> >> Connecting to default Realm
>> >> ---------- -- ------- -----
>> >> [LOG] : The default realm is : DOMAIN.HOST.COM
>> >> [LOG] : KDC hosts for realm DOMAIN.HOST.COM :2003_dc.domain.host.com
>> >> [LOG] : Trying to contact KDC for realm DOMAIN.HOST.COM...
>> >> [LOG] : Realm DOMAIN.HOST.COM is answering ticket requests
>> >> [PASS] : Default Realm is issuing tickets
>>
>> >> Validating the keytab entry for the host service principal
>> >> ---------- --- ------ ----- --- --- ---- ------- ---------
>> >> [LOG] : Host unix_client, aka unix_client.domain.host.com.
>> >> [LOG] : The default keytab name is : /etc/krb5.keytab
>> >> [LOG] : Keytab file /etc/krb5.keytab is present
>> >> [LOG] : Permissions on /etc/krb5.keytab are correct.
>> >> Keytab entry
>> >> Principal: host
>> >> Host : unix_client.domain.host.com
>> >> Realm : DOMAIN.HOST.COM
>> >> Version : 23
>> >> [LOG] : Pinging KDC to verify whether
>> >> host/unix_client.domain.host.... at DOMAIN.HOST.COM exists
>> >> pamkrbval: KDC policy rejects request for this entry
>> >> [WARNING] : The keytab entry for the host service principal
>> >> host/unix_client.domain.host.... at DOMAIN.HOST.COM is invalid
>> >> [FAIL] : The keytab validation failed
>>
>> >> Validating the rc_host file for ownership
>> >> -------- ------ ---- -------- ------ -----
>> >> [LOG] : rc_host file /usr/tmp/rc_host_0 is not present on the system
>> >> [PASS] :The Validation of rc_host file:/usr/tmp/rc_host_0 is successful
>>
>> >> unix_client:/var/adm/syslog >ktutil -i
>> >> ktutil: rkt /etc/krb5.keytab
>> >> ktutil: list
>> >> slot KVNO Principal
>> >> ---- ---- ---------------------------------------------------------------------
>> >> 1 23 host/unix_client.dom... at DOMAIN.HOST.COM
>> >> ktutil:
>> >> ktutil: unix_client:/var/adm/syslog >
>>
>> >> unix_client:/var/adm/syslog >kinit -kt /etc/krb5.keytab
>> >> host/unix_client.domain.host.com
>> >> kinit(v5): KDC policy rejects request while getting initial credentials
>>
>> >> Thanks in advance for any help
>>
>> >> Regards
>>
>> >> Richard
>> >> ________________________________________________
>> >> Kerberos mailing list Kerbe... at mit.edu
>> >>https://mailman.mit.edu/mailman/listinfo/kerberos
>>
>> > ________________________________________________
>> > Kerberos mailing list Kerbe... at mit.edu
>> >https://mailman.mit.edu/mailman/listinfo/kerberos- Hide quoted text -
>>
>> - Show quoted text -
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