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Ubuntu10.04安裝配置LDAP服務

   注:以Ubuntu 10.04版本為例,LDAP服務器和客戶端為同一台機器,最新openldap軟件服務器端無單獨的配置文件,而是將配置信息保存於數據庫中。

  1. LDAP服務器端安裝與配置

  1.1 安裝LDAP服務器相關軟件 sudo apt-get install slapd ldap-utils

  1.2 配置LDAP服務器數據庫 sudo ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/cosine.ldifsudo ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/nis.ldif sudo ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/inetorgperson.ldif sudo ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/misc.ldif (1)創建數據庫 在/var/lib/ldap/下創建create_database.ldif文件: # Load hdb backend module

  dn: cn=module{0},cn=config

  objectClass: olcModuleList

  cn: module

  olcModulepath: /usr/lib/ldap

  olcModuleload: {0}back_hdb

  # Create the hdb database and place the files under /var/lib/ldap

  dn: olcDatabase={1}hdb,cn=config

  objectClass: olcDatabaseConfig

  objectClass: olcHdbConfig

  olcDatabase: {1}hdb

  olcDbDirectory: /var/lib/ldap

  olcSuffix: dc=edu,dc=example,dc=org

  olcRootDN: cn=admin,dc=edu,dc=example,dc=org

  olcRootPW: {SSHA}5EdV7cSYlP44/gEWu+x3VKAKLN2HG4VX

  olcDbConfig: {0}set_cachesize 0 2097152 0

  olcDbConfig: {1}set_lk_max_objects 1500

  olcDbConfig: {2}set_lk_max_locks 1500

  olcDbConfig: {3}set_lk_max_lockers 1500

  olcLastMod: TRUE

  olcDbCheckpoint: 512 30

  olcDbIndex: uid pres,eq

  olcDbIndex: cn,sn,mail pres,eq,approx,sub

  olcDbIndex: objectClass eq 導入: sudo ldapadd -Y EXTERNAL -H ldapi:/// -f /var/lib/ldap/create_database.ldif注:create_database.ldif文件中olcRootPW參數後面的密文對應明文為"example",可用slappasswd命令獲取明文對應的密文

  (2)初始化數據庫 在/var/lib/ldap/下創建init_database.ldif文件: dn: dc=edu,dc=example,dc=org

  objectClass: top

  objectClass: dcObject

  objectclass: organization

  o: edu.example.org

  dc: edu

  #description: LDAP root

  dn: ou=People,dc=edu,dc=example,dc=org

  objectClass: top

  objectClass: organizationalUnit

  ou: People

  dn: ou=Groups,dc=edu,dc=example,dc=org

  objectClass: top

  objectClass: organizationalUnit

  ou: Groups 導入: sudo ldapadd -Y EXTERNAL -H ldapi:/// -f /var/lib/ldap/init_database.ldif

  (3)modify the ACL to limit access to the database. 在/var/lib/ldap/下創建acls.ldif文件: dn:olcDatabase={1}hdb,cn=config

  add: olcAccess

  olcAccess: {0}to attrs=userPassword,shadowLastChange by dn="cn=admin,dc=edu,dc=example,dc=org" write by anonymous auth by self write by * none

  olcAccess: {1}to dn.subtree="" by * read

  olcAccess: {2}to * by dn="cn=admin,dc=edu,dc=example,dc=org" write by * read 導入: sudo ldapmodify -Y EXTERNAL -H ldapi:/// -f /var/lib/ldap/acls.ldif

  (4)測試數據庫 sudo ldapsearch -x -h localhost -b dc=edu,dc=example,dc=org

  1.3 使用遷移工具migrationtools (1)安裝 sudo apt-get install migrationtools

  (2)使用該工具遷移Linux系統中的用戶和組到LDAP服務器中 cd /usr/share/migrationtools/ ./migrate_group.pl /etc/group ./group.ldif ./migrate_passwd.pl /etc/passwd ./passwd.ldif 修改group.ldif中組的父域名為ou=Groups,dc=edu,dc=example,dc=org 修改passwd.ldif中用戶的父域名為ou=People,dc=edu,dc=example,dc=orgldapadd -x -W -D "cn=admin,dc=edu,dc=example,dc=org" -f ./group.ldif ldapadd -x -W -D "cn=admin,dc=edu,dc=example,dc=org" -f ./passwd.ldif

  1.4 使用ldap服務器管理工具ldapscripts (1)安裝 sudo apt-get install ldapscripts

  (2)修改配置文件 # LDAP Configuration

  # DEBIAN: values from /etc/pam_ldap.conf are used.

  SERVER="ldap://localhost"

  BINDDN="cn=admin,dc=edu,dc=example,dc=org"

  # The following file contains the raw password of the binddn

  # Create it with something like : echo -n 'secret' > $BINDPWDFILE

  # WARNING !!!! Be careful not to make this file world-readable

  # DEBIAN: /etc/pam_ldap.secret or /etc/ldap.secret are used.

  BINDPWDFILE="/etc/ldapscripts/ldapscripts.passwd"

  # For older versions of OpenLDAP, it is still possible to use

  # unsecure command-line passwords by defining the following option

  # AND commenting the previous one (BINDPWDFILE takes precedence)

  #BINDPWD="secret"

  # DEBIAN: values from /etc/pam_ldap.conf are used.

  SUFFIX="dc=edu,dc=example,dc=org" # Global suffix

  GSUFFIX="ou=Groups" # Groups ou (just under $SUFFIX)

  USUFFIX="ou=People" # Users ou (just under $SUFFIX)

  #MSUFFIX="ou=Machines" # Machines ou (just under $SUFFIX)

  # User passwords generation

  # Command-line used to generate a password for added users (you may use %u for username here)

  # WARNING !!!! This is evaluated, everything specified here will be run !

  # Special value "" will ask for a password interactively

  #PASSWORDGEN="cat /dev/random | LC_ALL=C tr -dc 'a-zA-Z0-9' | head -c8"

  #PASSWORDGEN="head -c8 /dev/random | uuencode -m - | sed -n '2s|=*$||;2p' | sed -e 's|+||g' -e 's|/||g'"

  #PASSWORDGEN="pwgen"

  #PASSWORDGEN="echo changeme"

  #PASSWORDGEN="echo %u"

  PASSWORDGEN="" 注:如紅字所示,照應前面的配置,向ldapscripts.passwd寫入密碼的命令為:echo -n 'example' > /etc/ldapscripts/ldapscripts.passwd

  (3)使用 sudo ldapaddgroup testgroup sudo ldapadduser testuser testgroup sudo ldapsetpasswd testuser

  (4)測試 getent passwd getent group

  2. LDAP客戶端安裝與配置 2.1 使用apt-get安裝相關服務 #sudo apt-get install libnss-ldapd libpam-ldapd 安裝過程中根據安裝向導輸入ldap服務器IP和相應base域名信息,最後,針對nss services勾選group和passwd兩項即可。 注:Ubuntu系統中LDAP客戶端的配置文件為/etc/nslcd.conf和/etc/nsswitch.conf,以上配置信息都可以在該配置文件中隨時修改!修改後要重啟服務:service nslcd restart # /etc/nslcd.conf

  # nslcd configuration file. See nslcd.conf(5)

  # for details.

  # The user and group nslcd should run as.

  uid nslcd

  gid nslcd

  # The location at which the LDAP server(s) should be reachable.

  uri ldap://127.0.0.1/

  # The search base that will be used for all queries.

  base dc=edu,dc=example,dc=org

  # The LDAP protocol version to use.

  #ldap_version 3

  # The DN to bind with for normal lookups.

  #binddn cn=annonymous,dc=example,dc=net

  #bindpw secret

  # SSL options

  #ssl off

  #tls_reqcert never

  # The search scope.

  #scope sub # /etc/nsswitch.conf

  #

  # Example configuration of GNU Name Service Switch functionality.

  # If you have the `glibc-doc-reference' and `info' packages installed, try:

  # `info libc "Name Service Switch"' for information about this file.

  passwd: compat ldap

  group: compat ldap

  shadow: compat

  hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4

  networks: files

  protocols: db files

  services: db files

  ethers: db files

  rpc: db files

  netgroup: nis

  2.2 安裝配置完成後,使用以下命令驗證訪問LDAP服務器是否成功 #getent passwd#getent group 若不能正確顯示LDAP服務

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