My bad.. Should have looked at this before posting..

File permissions for /etc/krb5.conf were 600 for some reason. Changed them back 
to 644 and that resolved the issue.

Thanks,

~ abhi 


> On Jul 12, 2017, at 10:27 AM, Abhijit Tikekar <[email protected]> 
> wrote:
> 
> 
>> Hi,
>>  
>> We are having some trouble authenticating users via SSSD. Server has an 
>> established JOIN with the DC and we are able to use “id” and “getent passwd” 
>> without any issues. But authentication fails with the following messages:
>>  
>> Jul 12 08:38:19 hostname sshd[25967]: pam_sss(sshd:auth): authentication 
>> failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=rhost.x.y.local 
>> user=first.last
>> Jul 12 08:38:19 hostname sshd[25967]: pam_sss(sshd:auth): received for user 
>> first.last: 4 (System error)
>> Jul 12 08:38:21 hostname sshd[25963]: error: PAM: Permission denied for 
>> first.last from rhost.x.y.local
>>  
>>  
>> Under krb5_child.log, we see the following even though the user is a member 
>> of one of the groups added under “ad_access_filter”
>>  
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] [sss_send_pac] 
>> (0x0040): sss_pac_make_request failed [-1][2].
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] [validate_tgt] 
>> (0x0040): sss_send_pac failed, group membership for user with principal 
>> [first.last\@[email protected]] might not be correct.
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] 
>> [sss_child_krb5_trace_cb] (0x4000): [25625] 1499864410.696457: Destroying 
>> ccache MEMORY:rd_req2
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] 
>> [sss_get_ccache_name_for_principal] (0x4000): Location: 
>> [FILE:/tmp/krb5cc_233006683_XXXXXX]
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] 
>> [sss_get_ccache_name_for_principal] (0x2000): krb5_cc_cache_match failed: 
>> [-1765328243][Can't find client principal [email protected] in cache 
>> collection]
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] [create_ccache] 
>> (0x0020): 733: [13][Permission denied]
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] [map_krb5_error] 
>> (0x0020): 1301: [1432158209][Unknown code UUz 1]
>> (Wed Jul 12 08:00:10 2017) [[sssd[krb5_child[25625]]]] [k5c_send_data] 
>> (0x0200): Received error code 1432158209
>>  
>>  
>> [root@hostname sssd]# net ads testjoin
>> Join is OK
>> [root@hostname sssd]# net ads info
>> LDAP server: X.X.90.128
>> LDAP server name: AD-Server.x.y.local
>> Realm: X.Y.LOCAL
>> Bind Path: dc=X,dc=Y,dc=LOCAL
>> LDAP port: 389
>> Server time: Wed, 12 Jul 2017 09:03:08 CDT
>> KDC server: X.X.90.128
>> Server time offset: 0
>> Last machine account password change: Wed, 12 Jul 2017 07:41:59 CDT
>>  
>>  
>> SSSD Configuration:
>>  
>> [sssd]
>> domains = X.Y.LOCAL
>> services = nss, pam, sudo
>> config_file_version = 2
>> debug_level = 0
>> [nss]
>> [pam]
>> [sudo]
>> debug_level=2
>> [domain/x.y.local]
>> debug_level=2
>> ad_server = AD-Server.x.y.local
>> auth_provider = ad
>> access_provider = ad
>> ldap_id_mapping = true
>> ldap_use_tokengroups = true
>> krb5_realm = X.Y.LOCAL
>> ldap_access_order = filter, expire
>> ldap_account_expire_policy = ad
>>  
>> ad_access_filter = …….
>>  
>> cache_credentials = true
>> override_homedir = /home/%d/%u
>> default_shell = /bin/bash
>> ldap_schema = ad
>>  
>> Attached are sssd_x.y.local, krb5_child.log & ldap_child.log (level 10)
>>  
>> Also tried with ad_gpo_access_control = permissive & access_provider = 
>> permit but that didn’t allow auth either.
>>  
>> Any suggestions are highly appreciated.
>>  
>> Thanks in advance,
>>  
>> ~ Abhi
> <krb5_child.log>
> <ldap_child.log>
> <sssd_x.y.local.log>
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