It might be easier to read all of this on here: http://www.linuxquestions.org/questions/linux-server-73/unable-to-get-lda... I am able to bind and search AD with ldapsearch, but am unable to get openldap to use it as a backend db. I am able to search for a user in active directory by using the following: ldapsearch -v -H ldap://charizard.company.internal -x -b "dc=company,dc=internal" -D "cn=ldap proxy,cn=Users,dc=company,dc=internal" -w 'passwd' -LLL "(sAMAccountName=testuser)" My slapd.conf looks like: slapd.conf ----------- include /etc/openldap/schema/core.schema include /etc/openldap/schema/cosine.schema include /etc/openldap/schema/inetorgperson.schema include /etc/openldap/schema/nis.schema pidfile /var/run/openldap/slapd.pid argsfile /var/run/openldap/slapd.args loglevel 1024 database ldap suffix "cn=Users,dc=company,dc=internal" rootdn "cn=ldap proxy" uri "ldap://charizard.company.internal" binddn "cn=ldap proxy,cn=Users,dc=company,dc=internal" bindpw "passwd" rwm-rewriteEngine on rwm-map objectclass account user rwm-map attribute uid sAMAccountname rwm-map attribute cn name rwm-map attribute sn sn rwm-map attribute mail userPrincipalName rwm-map attribute * lastmod off chase-referrals no access to * by * read ----------------------------- When I try and search on my openldap host, I recive.. [kylec@localhost ~]$ ldapsearch -v -H ldap://localhost -x -b "cn=Users,dc=company,dc=internal" ldap_initialize( ldap://localhost ) filter: (objectclass=*) requesting: All userApplication attributes # extended LDIF # # LDAPv3 # base <cn=Users,dc=company,dc=internal> with scope subtree # filter: (objectclass=*) # requesting: ALL # # search result search: 2 result: 1 Operations error text: 00000000: LdapErr: DSID-0C090627, comment: In order to perform this ope ration a successful bind must be completed on the connection., data 0, vece # numResponses: 1 -------------------------------- In slapd debug log I can see the following... backend_startup_one: starting "cn=Users,dc=corpedia,dc=internal" ldap_back_db_open: URI=ldap://charizard.corpedia.internal slapd starting ldap_pvt_gethostbyname_a: host=heracross.corpedia.local, r=0 connection_get(9): got connid=0 connection_read(9): checking for input on id=0 ber_get_next ber_get_next: tag 0x30 len 12 contents: ber_get_next ber_get_next on fd 9 failed errno=11 (Resource temporarily unavailable) do_bind ber_scanf fmt ({imt) ber: ber_scanf fmt (m}) ber: <<< dnPrettyNormal: <>, <> do_bind: version=3 dn="" method=128 send_ldap_result: conn=0 op=0 p=3 send_ldap_response: msgid=1 tag=97 err=0 ber_flush: 14 bytes to sd 9 do_bind: v3 anonymous bind connection_get(9): got connid=0 connection_read(9): checking for input on id=0 ber_get_next ber_get_next: tag 0x30 len 69 contents: ber_get_next ber_get_next on fd 9 failed errno=11 (Resource temporarily unavailable) do_search ber_scanf fmt ({miiiib) ber: <<< dnPrettyNormal: <cn=Users,dc=corpedia,dc=internal>, <cn=users,dc=corpedia,dc=internal> ber_scanf fmt (m) ber: ber_scanf fmt ({M}}) ber: ==> limits_get: conn=0 op=1 dn="[anonymous]" ldap_create ldap_url_parse_ext(ldap://charizard.corpedia.internal) =>ldap_back_getconn: conn 0x8ad8a88 inserted refcnt=1 binding=1 ldap_search_ext put_filter: "(objectClass=*)" put_filter: simple put_simple_filter: "objectClass=*" ldap_send_initial_request ldap_new_connection 1 1 0 ldap_int_open_connection ldap_connect_to_host: TCP charizard.corpedia.internal:389 ldap_new_socket: 10 ldap_prepare_socket: 10 ldap_connect_to_host: Trying 10.0.0.6:389 ldap_connect_timeout: fd: 10 tm: -1 async: 0 ldap_open_defconn: successful ldap_send_server_request ber_scanf fmt ({it) ber: ber_scanf fmt ({) ber: ber_flush: 73 bytes to sd 10 ldap_result ld 0x8ad0860 msgid 1 ldap_chkResponseList ld 0x8ad0860 msgid 1 all 0 ldap_chkResponseList returns ld 0x8ad0860 NULL wait4msg ld 0x8ad0860 msgid 1 (timeout 100000 usec) wait4msg continue ld 0x8ad0860 msgid 1 all 0 ** ld 0x8ad0860 Connections: * host: charizard.corpedia.internal port: 389 (default) refcnt: 2 status: Connected last used: Fri Mar 27 16:23:13 2009 ** ld 0x8ad0860 Outstanding Requests: * msgid 1, origid 1, status InProgress outstanding referrals 0, parent count 0 ** ld 0x8ad0860 Response Queue: Empty ldap_chkResponseList ld 0x8ad0860 msgid 1 all 0 ldap_chkResponseList returns ld 0x8ad0860 NULL ldap_int_select read1msg: ld 0x8ad0860 msgid 1 all 0 ber_get_next ber_get_next: tag 0x30 len 167 contents: read1msg: ld 0x8ad0860 msgid 1 message type search-result ber_scanf fmt ({eaa) ber: read1msg: ld 0x8ad0860 0 new referrals read1msg: mark request completed, ld 0x8ad0860 msgid 1 request done: ld 0x8ad0860 msgid 1 res_errno: 0, res_error: <>, res_matched: <> ldap_free_request (origid 1, msgid 1) ldap_free_connection 0 1 ldap_free_connection: refcnt 1 ldap_parse_result ber_scanf fmt ({iaa) ber: ber_scanf fmt (}) ber: ldap_msgfree send_ldap_result: conn=0 op=1 p=3 send_ldap_response: msgid=2 tag=101 err=1 ber_flush: 163 bytes to sd 9 connection_get(9): got connid=0 connection_read(9): checking for input on id=0 ber_get_next ber_get_next: tag 0x30 len 5 contents: ber_get_next ber_get_next on fd 9 failed errno=0 (Success) connection_read(9): input error=-2 id=0, closing. connection_closing: readying conn=0 sd=9 for close do_unbind connection_close: deferring conn=0 sd=9 connection_resched: attempting closing conn=0 sd=9 connection_close: conn=0 sd=9 =>ldap_back_conn_destroy: fetching conn 0 connection_get(9): connection not used connection_read(9): no connection! Any help would be much appreciated :-)