Configure LDAP Server

	Configure LDAP Server in order to share users' accounts in your local networks.
[1]	Install OpenLDAP

[root@dir ~]# yum -y install openldap-servers openldap-clients [root@dir ~]# vi /etc/sysconfig/ldap # line 16: uncomment and change SLAPD_LDAPI= yes [root@dir ~]# vi /etc/openldap/slapd.conf # create new pidfile /var/run/openldap/slapd.pid argsfile /var/run/openldap/slapd.args [root@dir ~]# rm -rf /etc/openldap/slapd.d/* [root@dir ~]# slaptest -f /etc/openldap/slapd.conf -F /etc/openldap/slapd.d config file testing succeeded [root@dir ~]# vi /etc/openldap/slapd.d/cn=config/olcDatabase\={0}config.ldif # line 4: change olcAccess: {0}to * by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth manage by * break [root@dir ~]# vi /etc/openldap/slapd.d/cn=config/olcDatabase\={1}monitor.ldif # create new dn: olcDatabase={1}monitor objectClass: olcDatabaseConfig olcDatabase: {1}monitor olcAccess: {1}to * by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth manage by * break olcAddContentAcl: FALSE olcLastMod: TRUE olcMaxDerefDepth: 15 olcReadOnly: FALSE olcMonitoring: FALSE structuralObjectClass: olcDatabaseConfig creatorsName: cn=config modifiersName: cn=config [root@dir ~]# chown -R ldap. /etc/openldap/slapd.d [root@dir ~]# chmod -R 700 /etc/openldap/slapd.d [root@dir ~]# /etc/rc.d/init.d/slapd start Starting slapd: [ OK ] [root@dir ~]# chkconfig slapd on

[2]	Initial Configuration

[root@dir ~]# ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/core.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=core,cn=schema,cn=config" [root@dir ~]# ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/cosine.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=cosine,cn=schema,cn=config" [root@dir ~]# ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/nis.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=nis,cn=schema,cn=config" [root@dir ~]# ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/inetorgperson.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=inetorgperson,cn=schema,cn=config" [root@dir ~]# slappasswd # generate password New password: # input any one Re-enter new password: {SSHA}xxxxxxxxxxxxxxxxxxxxxxxx [root@dir ~]# vi backend.ldif # create new # replace the section "dc=***,dc=***" to your own suffix # replace the section "olcRootPW: ***" to your own password generated by slappasswd above dn: cn=module,cn=config objectClass: olcModuleList cn: module olcModulepath: /usr/lib64/openldap olcModuleload: back_hdb dn: olcDatabase=hdb,cn=config objectClass: olcDatabaseConfig objectClass: olcHdbConfig olcDatabase: {2}hdb olcSuffix: dc=server,dc=world olcDbDirectory: /var/lib/ldap olcRootDN: cn=admin,dc=server,dc=world olcRootPW: {SSHA}xxxxxxxxxxxxxxxxxxxxxxxx olcDbConfig: set_cachesize 0 2097152 0 olcDbConfig: set_lk_max_objects 1500 olcDbConfig: set_lk_max_locks 1500 olcDbConfig: set_lk_max_lockers 1500 olcDbIndex: objectClass eq olcLastMod: TRUE olcMonitoring: TRUE olcDbCheckpoint: 512 30 olcAccess: to attrs=userPassword by dn="cn=admin,dc=server,dc=world" write by anonymous auth by self write by * none olcAccess: to attrs=shadowLastChange by self write by * read olcAccess: to dn.base="" by * read olcAccess: to * by dn="cn=admin,dc=server,dc=world" write by * read [root@dir ~]# ldapadd -Y EXTERNAL -H ldapi:/// -f backend.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=module,cn=config" adding new entry "olcDatabase=hdb,cn=config" [root@dir ~]# vi frontend.ldif # create new # replace the section "dc=***,dc=***" to your own suffix # replace the section "userPassword: ***" to your own password generated by slappasswd above dn: dc=server,dc=world objectClass: top objectClass: dcObject objectclass: organization o: Server World dc: Server dn: cn=admin,dc=server,dc=world objectClass: simpleSecurityObject objectClass: organizationalRole cn: admin userPassword: {SSHA}xxxxxxxxxxxxxxxxxxxxxxxx dn: ou=people,dc=server,dc=world objectClass: organizationalUnit ou: people dn: ou=groups,dc=server,dc=world objectClass: organizationalUnit ou: groups [root@dir ~]# ldapadd -x -D cn=admin,dc=server,dc=world -W -f frontend.ldif Enter LDAP Password: # password you set adding new entry "dc=server,dc=world" adding new entry "cn=admin,dc=server,dc=world" adding new entry "ou=people,dc=server,dc=world" adding new entry "ou=groups,dc=server,dc=world"

[3]	Add Existing local Users to LDAP Directory

[root@dir ~]# vi ldapuser.sh # extract local users who have 500-999 digit UID # replace "SUFFIX=***" to your own suffix # this is an example #!/bin/bash SUFFIX='dc=server,dc=world' LDIF='ldapuser.ldif' echo -n > $LDIF for line in `grep "x:[5-9][0-9][0-9]:" /etc/passwd | sed -e "s/ /%/g"` do UID1=`echo $line | cut -d: -f1` NAME=`echo $line | cut -d: -f5 | cut -d, -f1` if [ ! "$NAME" ] then NAME=$UID1 else NAME=`echo $NAME | sed -e "s/%/ /g"` fi SN=`echo $NAME | awk '{print $2}'` if [ ! "$SN" ] then SN=$NAME fi GIVEN=`echo $NAME | awk '{print $1}'` UID2=`echo $line | cut -d: -f3` GID=`echo $line | cut -d: -f4` PASS=`grep $UID1: /etc/shadow | cut -d: -f2` SHELL=`echo $line | cut -d: -f7` HOME=`echo $line | cut -d: -f6` EXPIRE=`passwd -S $UID1 | awk '{print $7}'` FLAG=`grep $UID1: /etc/shadow | cut -d: -f9` if [ ! "$FLAG" ] then FLAG="0" fi WARN=`passwd -S $UID1 | awk '{print $6}'` MIN=`passwd -S $UID1 | awk '{print $4}'` MAX=`passwd -S $UID1 | awk '{print $5}'` LAST=`grep $UID1: /etc/shadow | cut -d: -f3` echo "dn: uid=$UID1,ou=people,$SUFFIX" >> $LDIF echo "objectClass: inetOrgPerson" >> $LDIF echo "objectClass: posixAccount" >> $LDIF echo "objectClass: shadowAccount" >> $LDIF echo "uid: $UID1" >> $LDIF echo "sn: $SN" >> $LDIF echo "givenName: $GIVEN" >> $LDIF echo "cn: $NAME" >> $LDIF echo "displayName: $NAME" >> $LDIF echo "uidNumber: $UID2" >> $LDIF echo "gidNumber: $GID" >> $LDIF echo "userPassword: {crypt}$PASS" >> $LDIF echo "gecos: $NAME" >> $LDIF echo "loginShell: $SHELL" >> $LDIF echo "homeDirectory: $HOME" >> $LDIF echo "shadowExpire: $EXPIRE" >> $LDIF echo "shadowFlag: $FLAG" >> $LDIF echo "shadowWarning: $WARN" >> $LDIF echo "shadowMin: $MIN" >> $LDIF echo "shadowMax: $MAX" >> $LDIF echo "shadowLastChange: $LAST" >> $LDIF echo >> $LDIF done [root@dir ~]# sh ldapuser.sh [root@dir ~]# ldapadd -x -D cn=admin,dc=server,dc=world -W -f ldapuser.ldif Enter LDAP Password: # LDAP admin password adding new entry "uid=cent,ou=people,dc=server,dc=world" adding new entry "uid=fedora,ou=people,dc=server,dc=world" adding new entry "uid=ubuntu,ou=people,dc=server,dc=world" adding new entry "uid=debian,ou=people,dc=server,dc=world" adding new entry "uid=fermi,ou=people,dc=server,dc=world"

[4]	Add existing local groups to LDAP directory.

[root@dir ~]# vi ldapgroup.sh # extract local groups who have 500-999 digit UID # replace "SUFFIX=***" to your own suffix # this is an example #!/bin/bash SUFFIX='dc=server,dc=world' LDIF='ldapgroup.ldif' echo -n > $LDIF for line in `grep "x:[5-9][0-9][0-9]:" /etc/group` do CN=`echo $line | cut -d: -f1` GID=`echo $line | cut -d: -f3` echo "dn: cn=$CN,ou=groups,$SUFFIX" >> $LDIF echo "objectClass: posixGroup" >> $LDIF echo "cn: $CN" >> $LDIF echo "gidNumber: $GID" >> $LDIF users=`echo $line | cut -d: -f4 | sed "s/,/ /g"` for user in ${users} ; do echo "memberUid: ${user}" >> $LDIF done echo >> $LDIF done [root@dir ~]# sh ldapgroup.sh [root@dir ~]# ldapadd -x -D cn=admin,dc=server,dc=world -W -f ldapgroup.ldif Enter LDAP Password: # LDAP admin password adding new entry "cn=cent,ou=groups,dc=server,dc=world" adding new entry "cn=fedora,ou=groups,dc=server,dc=world" adding new entry "cn=ubuntu,ou=groups,dc=server,dc=world" adding new entry "cn=debian,ou=groups,dc=server,dc=world" adding new entry "cn=fermi,ou=groups,dc=server,dc=world"

[5]	If you'd like to delete User or Group in LDAP, Do as below.

[root@dir ~]#

ldapdelete -x -W -D 'cn=admin,dc=server,dc=world' "uid=cent,ou=people,dc=server,dc=world"

Enter LDAP Password:
[root@dir ~]#

ldapdelete -x -W -D 'cn=admin,dc=server,dc=world' "cn=cent,ou=groups,dc=server,dc=world"

Enter LDAP Password: