Dear Nick,
I was able to successfully create the keytab however i used the credentials of the domainadmin instead of the squidadmin account.
Markus,
Please tell me what i am doing wrong that i am unable to create keytab with squidadmin account though i tried to do according to your guidance. what i am missing?
please guide
regards,
Bilal Aslam
----------------------------------------
> From: gigoz@xxxxxxx
> To: nick.cairncross@xxxxxxxxxxxxxxx; huaraz@xxxxxxxxxxxxxxxx; squid-users@xxxxxxxxxxxxxxx
> Date: Thu, 15 Apr 2010 10:17:40 +0000
> Subject: RE: Re: Re: Creating a kerberos Service Principal.
>
>
> Nick,
>
> I tried but with not much success.
>
> .................
> No computer account for squid-http found, creating a new one.
> Error: ldap_add_ext_s failed (Insufficient access)
> Error: ldap_check_account failed (No CSI structure available)
> Error: set_password failed
> -- krb5_cleanup: Destroying Kerberos Context
> -- ldap_cleanup: Disconnecting from LDAP server
> -- init_password: Wiping the computer password structure
> ...............................
>
>
>
>
> regards,
>
>
> Bilal
> ----------------------------------------
>> From: Nick.Cairncross@xxxxxxxxxxxxxxx
>> To: gigoz@xxxxxxx; huaraz@xxxxxxxxxxxxxxxx; squid-users@xxxxxxxxxxxxxxx
>> Date: Thu, 15 Apr 2010 09:31:40 +0100
>> Subject: Re: Re: Re: Creating a kerberos Service Principal.
>>
>> Bilal,
>>
>> I think we're doing a similar thing here! See my post earlier about SPN. I think you need to be using the fqdn of the machine in the HTTP/ spn & upn and not just the domain. Also check your DNS and host local host entries.
>>
>> E.g.: msktutil -c -b "CN=COMPUTERS" -s HTTP/squid1.[mydomain] -k /etc/squid/HTTP.keytab --computer-name auth1 --upn HTTP/squid1 --server dc1 -verbose
>>
>> Nick
>>
>>
>>
>> On 15/04/2010 07:22, "GIGO ." wrote:
>>
>>
>>
>> Dear Markus/all,
>>
>>
>> I am unable to create the keytab using mskutil please help me out i followed the following steps:
>>
>> 1. I created a OU and named it UnixOU
>> 2. I created a group account in the UnixOU and named it as UnixAdmins
>> 3. I make my windows account bilal_admin part of UnixAdmins group.
>> 4. I set the settings of UnixOU to be managed by UnixAdmins.
>> 5. Then i synch time of Squid Machine and Active directory.
>> 6. My domain fully qualified domain name is v.local and netbios names is V.
>> 7. My domain controller name is vdc (fqdn=vdc.v.local)
>> 8. The following lines were changed in the krb5.conf while rest being untouched.
>>
>> [libdefaults]
>> default_realm=V.LOCAL
>>
>>
>> [realms]
>>
>> V.LOCAL = {
>> kdc = vdc.v.local:88
>> admin_server = kerberos.example.com:749 (e.g this not changed does it matter at the step of creation of keytab)
>> default_domain = example.com (unchanged)
>> }
>>
>>
>>
>>
>> The i run the following commands to create the keytab:
>>
>> kinit squidadmin@xxxxxxx
>>
>>
>> msktutil -c -b "OU=unixPrincipals" -s HTTP/v.local -h squidLhrTest.v.local -k /etc/squid/HTTP.keytab --computer-name squid-http --upn HTTP/v.local --server vdc.v.local --verbose
>>
>> Output of the Command:
>>
>> -- init_password: Wiping the computer password structure
>> -- finalize_exec: Determining user principal name
>> -- finalize_exec: User Principal Name is: HTTP/v.local@xxxxxxx
>> -- create_fake_krb5_conf: Created a fake krb5.conf file: /tmp/.mskt-3550krb5.conf
>> -- get_krb5_context: Creating Kerberos Context
>> -- try_machine_keytab: Using the local credential cache: /tmp/.mskt-3550krb5_ccache
>> -- try_machine_keytab: krb5_get_init_creds_keytab failed (Client not found in Kerberos database)
>> -- try_machine_keytab: Unable to authenticate using the local keytab
>> -- try_ldap_connect: Connecting to LDAP server: vdc.v.local
>> -- try_ldap_connect: Connecting to LDAP server: vdc.v.local
>> SASL/GSSAPI authentication started
>> SASL username: squidadmin@xxxxxxx
>> SASL SSF: 56
>> SASL installing layers
>> -- ldap_get_base_dn: Determining default LDAP base: dc=v,dc=local
>> Warning: No DNS entry found for squidLhrTest.v.local
>> -- get_short_hostname: Determined short hostname: squidLhrTest-v-local
>> -- finalize_exec: SAM Account Name is: squid-http$
>> Updating all entries for squidLhrTest.v.local in the keytab /etc/squid/HTTP.keytab
>> -- try_set_password: Attempting to reset computer's password
>> -- ldap_check_account: Checking that a computer account for squid-http$ exists
>> No computer account for squid-http found, creating a new one.
>> Error: ldap_add_ext_s failed (Insufficient access)
>> Error: ldap_check_account failed (No CSI structure available)
>> Error: set_password failed
>> -- krb5_cleanup: Destroying Kerberos Context
>> -- ldap_cleanup: Disconnecting from LDAP server
>> -- init_password: Wiping the computer password structure
>>
>>
>> please help me resolving the issue.
>>
>> regards,
>>
>> Bilal Aslam
>>
>>
>>
>>
>> ----------------------------------------
>>> To: squid-users@xxxxxxxxxxxxxxx
>>> From: huaraz@xxxxxxxxxxxxxxxx
>>> Date: Fri, 9 Apr 2010 08:10:19 +0100
>>> Subject: Re: Re: Creating a kerberos Service Principal.
>>>
>>> Hi Bilal,
>>>
>>> I create a new OU in Active Directory like OU=UnixPrincipals,DC=... I
>>> then create a Windows Group UnixAdministrators and add the Windows account
>>> of the UnixAdministrators to it. Finally I change the permissions on the
>>> OU=UnixPrincipals so that the members of the group UnixAdministrators have
>>> full rights (or limited rights ) for objects under this OU.
>>>
>>> Regards
>>> Markus
>>>
>>> "GIGO ." wrote in message
>>> news:SNT134-w395B3433738667DED2186EB9150@xxxxxxxxxx
>>>
>>> Markus could not get you please can you elaborate a bit.
>>>
>>>
>>> thank you all!
>>>
>>> regards,
>>>
>>> Bilal
>>>
>>> ----------------------------------------
>>>> To: squid-users@xxxxxxxxxxxxxxx
>>>> From: huaraz@xxxxxxxxxxxxxxxx
>>>> Date: Thu, 8 Apr 2010 20:04:30 +0100
>>>> Subject: Re: Creating a kerberos Service Principal.
>>>>
>>>> BTW You do not need Administrator rights. You can set permission for
>>>> different Groups on OUs for example for Unix Kerberos Admins.
>>>>
>>>> Markus
>>>>
>>>> "Khaled Blah" wrote in message
>>>> news:n2j4a3250ab1004080957id2f4a051xb31445428c62bea0@xxxxxxxxxxxxxxxxx
>>>> Hi Bilal,
>>>>
>>>> 1. ktpass and msktutil practically do the same, they create keytabs
>>>> which include the keys that squid will need to decrypt the ticket it
>>>> receives from the user. However ktpass only creates a file which you
>>>> will then have to securely transfer to your proxy server so that squid
>>>> can access it. Using msktutil on your proxy server, you can get the
>>>> same keytab without having to transfer it. Thus, msktutil saves you
>>>> some time and hassle. AFAIR both need "Administrator" rights, which
>>>> means the account used for ktpass/msktutil needs to be a member of the
>>>> Administrator group.
>>>>
>>>>
>>>> 2. To answer this question, one would need more information about your
>>>> network and your setup. Basically, mixing any other authentication
>>>> method with Kerberos is not a good idea. That's because if the other
>>>> method is insecure or less secure an attacker who gains access to a
>>>> user's credentials will be able to impersonate that user against
>>>> Kerberos and those be able to use ALL services that this user has
>>>> access to. In any case DO NOT use basic auth with Kerberos in a
>>>> public, set-up. That's a recipe for disaster. Digest auth and NTLM
>>>> (v2) might be suitable but these are in fact less secure than Kerberos
>>>> and thus not preferrable. One down-side to Kerberos is that it's an
>>>> "all-or-nothing" service, either you use Kerberos and only Kerberos or
>>>> you risk security breaches in any "mixed" situation.
>>>>
>>>> HTH
>>>>
>>>> Khaled
>>>>
>>>> 2010/4/6 GIGO . :
>>>>>
>>>>> Dear All,
>>>>>
>>>>> Please guide me in regard to SSO setup with Active Directory(No
>>>>> winbind/Samba). I have the following questions in this regard.
>>>>>
>>>>>
>>>>>
>>>>> 1. Creating a Kerberos service principal and keytab file that is used by
>>>>> the Squid what is the effective method? Difference between using Ktpass
>>>>> vs
>>>>> Msktutil package? What rights would i be required in Active Directory and
>>>>> if none then why so?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> 2. How to configure the fallback Authentication scheme if Kerberos fails?
>>>>> Ldap authentication using basic looks to be an option but isnt it less
>>>>> secure? is there a better approach possible.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> regards,
>>>>>
>>>>> Bilal Aslam
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