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Re: Help me configure Kerberos Authentication

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Hi Go,

Can you describe in detail what you did ( e.g. exact msktutil command). BTW I updated yesterday the wiki pointing to a newer msktutil (version 0.4) which you should try in the case you use an older version.

It looks to me that your client is not able to get the Kerberos ticket from AD why the client falls back to NTLM and the negotiate wrapper deals now with these case.

To find out why the client does not get the ticket you can run wireshark and look for traffic on port 88.

Markus


"Go Wow" <gowows@xxxxxxxxx> wrote in message news:BANLkTinqnrMS5t2tq7FRN+-NOeZsMy5GOQ@xxxxxxxxxxxxxxxxx
When I run msktutil I get this line in the output.

krb5_get_init_creds_keytab failed (Client not found in Kerberos database)

I did kinit before issuing msktutil and it ran successfully. I can see
tickets when I issue klist.



On 30 April 2011 10:43, Go Wow <gowows@xxxxxxxxx> wrote:
Hi,

I'm trying to configure Kerberos Authentication for squid. I'm
running Squid 3.1.12 and Windows 2008 R2 SP2. I have followed the
kerberos authentication guide on squid-cache and many other guides, I
always end up with these logs in my cache.log. My client browser keeps
prompting for username/password. Even a valid set of credentials are
not accepted.

2011/04/30 10:24:32| squid_kerb_auth: WARNING: received type 1 NTLM token
2011/04/30 10:24:32| authenticateNegotiateHandleReply: Error
validating user via Negotiate. Error returned 'BH received type 1 NTLM
token'
2011/04/30 10:24:36| squid_kerb_auth: DEBUG: Got 'YR
TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==' from squid
(length: 59).
2011/04/30 10:24:36| squid_kerb_auth: DEBUG: Decode
'TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==' (decoded
length: 40).
2011/04/30 10:24:36| squid_kerb_auth: WARNING: received type 1 NTLM token
2011/04/30 10:24:36| authenticateNegotiateHandleReply: Error
validating user via Negotiate. Error returned 'BH received type 1 NTLM
token'
2011/04/30 10:24:36| squid_kerb_auth: DEBUG: Got 'YR
TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==' from squid
(length: 59).
2011/04/30 10:24:36| squid_kerb_auth: DEBUG: Decode
'TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==' (decoded
length: 40).
2011/04/30 10:24:36| squid_kerb_auth: WARNING: received type 1 NTLM token
2011/04/30 10:24:36| authenticateNegotiateHandleReply: Error
validating user via Negotiate. Error returned 'BH received type 1 NTLM
token'


I want to check and make sure my keytab entries are good. How do I do
that? My client System can list the tickets for client principal.

Please have a look at my krb5.conf & keytab file here
http://pastebin.com/vTBr3r5D

I'm using this command to create the keytab file.
msktutil -c -b "CN=COMPUTERS" -s HTTP/proxyserver.orangegroup.com -h
proxyserver.orangegroup.com -k /etc/krb5.keytab --computer-name
proxyserver-http --upn HTTP/proxyserver.orangegroup.com --server
ad01.orangegroup.com --verbose

All the domains are resolving properly to IPs.

Thanks for your help.





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