Hello, sssd appears to bind successfully, but when it tries to fetch user information id balks. Here is a snippit from the log file immediately after the successful bind. (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [simple_bind_done] (0x0080): Bind result: Success(0), no errmsg set (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [fo_set_port_status] (0x0100): Marking port 389 of server 'mymachine' as 'working' (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [set_server_common_status] (0x0100): Marking server 'mymachine' as 'working' (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [sdap_get_generic_ext_done] (0x0040): Unexpected result from ldap: Protocol error(2), Dereference control: attribute decoding error (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [sdap_x_deref_search_done] (0x0100): sdap_get_generic_ext_recv failed [5]: Input/output error (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [sdap_deref_search_done] (0x0040): dereference processing failed [5]: Input/output error (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [sdap_nested_done] (0x0020): Nested group processing failed: [5][Input/output error] (Tue Feb 19 13:49:14 2013) [sssd[be[SIBYLS]]] [acctinfo_callback] (0x0100): Request processed. Returned 3,5,Group lookup failed (Tue Feb 19 13:49:14 2013) [sssd[nss]] [nss_cmd_getgrgid_dp_callback] (0x0040): Unable to get information from Data Provider Error: 3, 5, Group lookup failed Will try to return what we have in cache ldpasearch works fine: ldapsearch -x -D "uid=nss,dc=mydomain" -b "dc=mydomain" -w secret "cn=somegroupname" -LL and produces copious information about all the members of "somegroupname" this is causing a major headache as a simple ls -l will hang the system. Thanks, Scott