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--- classes:la_slapd [2016/12/14 19:41] – curry_searle
+++ classes:la_slapd [2016/12/15 20:43] (current) – curry_searle
@@ Line 2: / Line 2: @@
 The outline of this tutorial contains the following sections:
-  - Server: Configure OpenLDAP and add users
+  - [[classes:la_slapd_l1|Server: Configure OpenLDAP and add users]]
-  - Server: Configure NFS to export home directories to a client system
+  - [[classes:la_slapd_l2|Server: Configure NFS to export home directories]]
-  - Client: Configure PAM to authente using our LDAP directory
+  - [[classes:la_slapd_l3|Client: Configure PAM to authenticate using our OpenLDAP directory]]
-  - Client: Configure AutoFS to auto-mount user home directories from the server to the client
+  - [[classes:la_slapd_l4|Client: Configure AutoFS to auto-mount user home directories from the server to the client]]
-For this tutorial we will create three users in our LDAP directory, Tom, Olive and Kevin; all with the password of ''1234567''. In addition to these three directory users, we will login with the local account, ''user'', which has sudo permissions on both our server (cls-kvm1) and client (cls-kvm2). For simplicity, any time we are prompted for a password, we will use this same number sequence, one through seven, above. You can follow along in the documentation for this lesson; it is written to be a copy and paste guide.
+For this tutorial we will create three users in our LDAP directory, Tom, Olive and Kevin; all with the password of ''1234567''. In addition to these three directory users, we will login with a local account, ''user'', which has sudo permissions on both our server (cls-kvm1) and client (cls-kvm2). For simplicity, any time we are prompted for a password, we will use the same number sequence, one through seven, listed above. You can follow along in the documentation for each lesson which is written to be a copy and paste guide.
-=== Server: Configure OpenLDAP and add users ===
-Let's get started by logging into our server and installing OpenLDAP:
-<code>
-sudo apt-get -y install slapd ldap-utils
-</code>
-When prompted, enter a password for your LDAP ''admin'' user and press enter. For the purposes of this tutorial we will use ''1234567'' for the password. Confirm the password and press enter again.
-Using your favorite editor, modify /etc/ldap/ldap.conf to contain the following, non-comment lines:
-<code>
-TLS_CACERT      /etc/ssl/certs/ca-certificates.crt
-BASE	dc=itsm,dc=unt,dc=edu
-URI	ldap://localhost:389
-</code>
-Restart the ldap service to reload the new configuration:
-<code>
-sudo service slapd restart
-</code>
-Confirm the slapd service is running; you should see a line, ''active (running)'', in the output of your ''service'' command:
-<code>
-service slapd status
-● slapd.service - LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol)
-   Loaded: loaded (/etc/init.d/slapd; bad; vendor preset: enabled)
-   Active: active (running) since Wed 2016-12-14 00:23:38 CST; 52min ago
-     Docs: man:systemd-sysv-generator(8)
-    Tasks: 3
-   Memory: 9.6M
-      CPU: 52ms
-   CGroup: /system.slice/slapd.service
-           └─2632 /usr/sbin/slapd -h ldap:/// ldapi:/// -g openldap -u openldap -F /etc/ldap/slapd.d
-</code>
-Confirm your ldap server is answering requests by giving it a simple request:
-<code>
-ldapsearch -x
-# extended LDIF
-#
-# LDAPv3
-# base <dc=itsm,dc=unt,dc=edu> (default) with scope subtree
-# filter: (objectclass=*)
-# requesting: ALL
-#
-# itsm.unt.edu
-dn: dc=itsm,dc=unt,dc=edu
-objectClass: top
-objectClass: dcObject
-objectClass: organization
-o: unt.edu
-dc: itsm
-# admin, itsm.unt.edu
-dn: cn=admin,dc=itsm,dc=unt,dc=edu
-objectClass: simpleSecurityObject
-objectClass: organizationalRole
-cn: admin
-description: LDAP administrator
-# search result
-search: 2
-result: 0 Success
-# numResponses: 3
-# numEntries: 2
-</code>
-like this
-Now that we have our LDAP server running, lets populate it with some users. Create a file named ''users.ldif'' which includes the following data:
-<code>
-dn: uid=tom,dc=itsm,dc=unt,dc=edu
-objectClass: top
-objectClass: account
-objectClass: posixAccount
-objectClass: shadowAccount
-cn: tom
-uid: tom
-uidNumber: 5010
-gidNumber: 9010
-homeDirectory: /home/tom
-loginShell: /bin/bash
-gecos: tom
-userPassword: {SHA}JzP8b+cWb3X2Q6v6Ulz2ADkL+VE=
-shadowLastChange: 17531
-shadowMax: 0
-shadowWarning: 0
-dn: uid=olive,dc=itsm,dc=unt,dc=edu
-objectClass: top
-objectClass: account
-objectClass: posixAccount
-objectClass: shadowAccount
-cn: olive
-uid: olive
-uidNumber: 5011
-gidNumber: 9011
-homeDirectory: /home/olive
-loginShell: /bin/bash
-gecos: olive
-userPassword: {SHA}JzP8b+cWb3X2Q6v6Ulz2ADkL+VE=
-shadowLastChange: 17531
-shadowMax: 0
-shadowWarning: 0
-dn: uid=kevin,dc=itsm,dc=unt,dc=edu
-objectClass: top
-objectClass: account
-objectClass: posixAccount
-objectClass: shadowAccount
-cn: kevin
-uid: kevin
-uidNumber: 5012
-gidNumber: 9012
-homeDirectory: /home/kevin
-loginShell: /bin/bash
-gecos: kevin
-userPassword: {SHA}JzP8b+cWb3X2Q6v6Ulz2ADkL+VE=
-shadowLastChange: 17531
-shadowMax: 0
-shadowWarning: 0
-</code>
-Now that we have a data file containing user information, we can import it into our LDAP database using the ''ldapadd'' command, entering our password when prompted:
-<code>
-ldapadd -a -D 'cn=admin,dc=itsm,dc=unt,dc=edu' -W -f ~/users.ldif
-Enter LDAP Password:
-adding new entry "uid=tom,dc=itsm,dc=unt,dc=edu"
-adding new entry "uid=olive,dc=itsm,dc=unt,dc=edu"
-adding new entry "uid=kevin,dc=itsm,dc=unt,dc=edu"
-</code>
-We can confirm the users were added by performing another ''ldapsearch'' command as follows:
-<code>
-ldapsearch -x objectClass=account dn cn uidnumber gidnumber
-# extended LDIF
-#
-# LDAPv3
-# base <dc=itsm,dc=unt,dc=edu> (default) with scope subtree
-# filter: objectClass=account
-# requesting: dn cn uidnumber gidnumber
-#
-# tom, itsm.unt.edu
-dn: uid=tom,dc=itsm,dc=unt,dc=edu
-cn: tom
-uidNumber: 5010
-gidNumber: 9010
-# olive, itsm.unt.edu
-dn: uid=olive,dc=itsm,dc=unt,dc=edu
-cn: olive
-uidNumber: 5011
-gidNumber: 9011
-# kevin, itsm.unt.edu
-dn: uid=kevin,dc=itsm,dc=unt,dc=edu
-cn: kevin
-uidNumber: 5012
-gidNumber: 9012
-# search result
-search: 2
-result: 0 Success
-# numResponses: 4
-# numEntries: 3
-</code>
-=== Client: Configure PAM authentication to use LDAP ===
-Now that we have our OpenLDAP server configured and populated with users, we can move on to configuring our linux workstation to authenticate using our LDAP directory.
-Logon to the client system (''ssh user@cls-kvm2'') and install required dependencies:
-<code>
-sudo apt-get -y install ldap-auth-client nscd autofs
-</code>
-Configure ldap-auth-config:
-<code>
-sudo dpkg-reconfigure ldap-auth-config
-</code>
-Include the following settings:
-<code>
-LDAP Server URI: ldap://cls-kvm1.itsm.unt.edu
-Distinguised name of the search base: dc=itsm,dc=unt,dc=edu
-LDAP version to use: 3
-Make local root Database admin: Yes
-Does the LDAP require login: No
-LDAP account for root: cn=admin,dc=itsm,dc=unt,dc=edu
-LDAP root account password
-</code>
-Configure NSS authentication client for LDAP:
-<code>
-sudo auth-client-config -t nss -p lac_ldap
-</code>
- - /etc/auth
-Update PAM configuration:
-<code>
-sudo pam-auth-update
-</code>
-Ensure the following are checked and choose Ok:
-<code>
-PAM profiles to enable:
- * Unix authentication
- * LDAP Authentication
- * Register user sessions in the systemd control group hierarchy
-</code>
-Restart the NSCD service:
-<code>
-sudo service nscd restart
-</code>
-Edit ''/etc/pamd.d/common-password'' to remove the ''use_authok'' from the ''password'' entry:
-<code>
-#password       [success=1 user_unknown=ignore default=die]     pam_ldap.so use_authtok try_first_pass
-password        [success=1 user_unknown=ignore default=die]     pam_ldap.so try_first_pass
-</code>
-Confirm the client sees the LDAP accounts as available for authentication; look for our LDAP users in the output of ''getent passwd'':
-<code>
-getenet passwd
-...
-tom:x:5010:9010:tom:/home/tom:/bin/bash
-olive:x:5011:9011:olive:/home/olive:/bin/bash
-kevin:x:5012:9012:kevin:/home/kevin:/bin/bash
-</code>
-Test authentication using ''su - kevin'' or ''su - olive'':
-<code>
-su - kevin
-Password:
-No directory, logging in with HOME=/
-groups: cannot find name for group ID 9012
-kevin@cls-kvm2:/$
-</code>
-In the next step we will resolve the ''No directory, logging in with HOME=/'' error message by configuring autofs mounted home directories.
-Still on the client machine, install our AutoFS dependencies:
-<code>
-</code>