On Thu, Oct 25, 2012 at 10:36:05AM +0200, Tomas Brandysky wrote:
> Hello,
> 
> we're upgrading from Centos 5.8 to Centos 6.3 and have realized few
> things have changed in the system.
> 
> We're using LDAP authentication (nss_ldap package) on our Centos 5.8
> servers and have different PAM ldap configuration files configured to be
> used for specific PAM services at the moment.
> 
> Here is the example of our setup:
> 
> /etc/pam.d/service1:
>  auth        sufficient    pam_ldap.so config=/etc/ldap_service1.conf
> 
> /etc/pam.d/service2:
>  auth        sufficient    pam_ldap.so config=/etc/ldap_service2.conf
> 
> Thus we can use specific LDAP filters for various different services as
> not all users having access to one service also have access to other
> services on the same server.
> 
> Now we're facing the problem to manage the same functionality with
> System Security Services Daemon (SSSD) which was newly presented with
> RHEL 6.
> 
> We didn't find out so far how to specify custom sssd configuration file
> (or specific part of the configuration section/domain) in PAM service
> configuration. According to documentation only these options can be
> specified when using pam_sss module: [forward_pass] [use_first_pass]
> [use_authtok].
> 
> None of them can be used to make a difference in a ldap filter to be used.
> 
> Is there a way how to configure specific search filters depending on PAM
> service ?
> 
> Thank you for any suggestion

I think what you are looking for is covered in
https://fedorahosted.org/sssd/ticket/1021.

If you only want to allow/deny access for specific users to specific
service you can add an attribute to the user objects in the LDAP server
listing the allowed PAM services and use ldap_user_authorized_service.
See sssd-ldap man page for details.

If you want more fine grained access control you might want to have a
look at the FreeIPA HBAC rules.

HTH

bye,
Sumit

> 
> Regards
> 
> Tomas Brandysky
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