Dear list members, i have installed a CentOS 7 x86_64 system. I want to let users authenticate over our ldap server. This seems to be working. ldap-username and ldap-passwords are accepted for the users configured in the ldap server. No problem. Now i want to restrict the access to users who have my centos-machine in their ldap host attribute. My problem is, that this host attribute seems to be ignored. Any ldap user, independent from the host attribute, still can login in. What could be the reason? (googling around did not lead me to a solution). The cache is already flushed. Here is my configuration: /etc/openldap/ldap.conf contains the line: ------------------------------------------ pam_check_host_attr yes /etc/sssd/sssd.conf: -------------------- [sssd] config_file_version = 2 services = nss, pam, autofs domains = default # SSSD will not start if you do not configure any domains. # Add new domain configurations as [domain/<NAME>] sections, and # then add the list of domains (in the order you want them to be # queried) to the "domains" attribute below and uncomment it. # domains = LDAP [nss] filter_groups = root filter_users = root [pam] [domain/default] ldap_uri = ldap://myldapserver.mydomain ldap_search_base = o=XXXX ldap_schema = rfc2307bis id_provider = ldap ldap_user_uuid = entryuuid ldap_group_uuid = entryuuid ldap_id_use_start_tls = True enumerate = False cache_credentials = False ldap_tls_cacertdir = /etc/openldap/cacerts/ chpass_provider = ldap auth_provider = ldap ldap_tls_reqcert = never ldap_user_search_base = ou=YYYY,o=XXXX ldap_group_search_base = ou=YYYY,o=XXXX access_provider = ldap ldap_access_filter = memberOf=ou=YYYY,o=XXXX ldap_access_order = host /etc/pam.d/system-auth: ----------------------- #%PAM-1.0 # This file is auto-generated. # User changes will be destroyed the next time authconfig is run. auth required pam_env.so auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 200 quiet_success #auth sufficient pam_sss.so use_first_pass auth required pam_sss.so use_first_pass auth required pam_deny.so auth sufficient pam_unix.so try_first_pass account required pam_unix.so broken_shadow account sufficient pam_succeed_if.so uid < 2000 quiet account [default=bad success=ok user_unknown=ignore] pam_sss.so account required pam_permit.so password requisite pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type= password sufficient pam_unix.so md5 shadow nullok try_first_pass use_authtok password sufficient pam_sss.so use_authtok password required pam_deny.so session optional pam_keyinit.so revoke session required pam_limits.so -session optional pam_systemd.so session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid session required pam_unix.so session optional pam_sss.so in /etc/nscd.conf: ------------------ enable-cache passwd no enable-cache group no enable-cache hosts no enable-cache services no enable-cache netgroup no /etc/nsswitch.conf: ................... passwd: files sss ldap shadow: files sss ldap group: files sss ldap #initgroups: files #hosts: db files nisplus nis dns hosts: files dns # Example - obey only what nisplus tells us... #services: nisplus [NOTFOUND=return] files #networks: nisplus [NOTFOUND=return] files #protocols: nisplus [NOTFOUND=return] files #rpc: nisplus [NOTFOUND=return] files #ethers: nisplus [NOTFOUND=return] files #netmasks: nisplus [NOTFOUND=return] files bootparams: nisplus [NOTFOUND=return] files ethers: files netmasks: files networks: files protocols: files rpc: files services: files sss netgroup: files sss ldap publickey: nisplus automount: files sss ldap aliases: files nisplus The ldap attributes of the user who can login, but should not: -------------------------------------------------------------- dn: uid=USER1,ou=XXXX,o=YYYY accountStatus: active objectClass: posixAccount objectClass: top objectClass: inetOrgPerson objectClass: shadowAccount objectClass: ibm-auxAccount objectClass: qmailUser objectClass: sambaSamAccount uid: USER1 uidNumber: **** shadowFlag: 0 shadowInactive: -1 gidNumber: *** shadowMin: -1 shadowMax: 999999 homeDirectory: /home/USER1 sn: USER1 mail: USER1 at my.doma.in mailHost: lmtp:unix:/var/lib/imap/socket/lmtp shadowWarning: 7 sambaSID: ***************************************** shadowExpire: -1 mailAlternateAddress: USER1a cn: surname lastname gecos: surname lastname loginShell: /bin/bash host: another-node What information is still missing? Any hint is welcome. Thank you in advance, ulrich