Linux does have directory server called OpenLDAP, but it requires good understanding and admin skills. MS-Ad has reputation for ease of use. Samba is a free software re-implementation of SMB/CIFS networking protocol mainly used by Microsoft. One of the goals of Samba version 4 is to implement an Active Directory compatible Domain Controller. Major features for Samba 4 already include:
- support of the ‘Active Directory’ logon and administration protocols
- new ‘full coverage’ testsuites
- full NTFS semantics for sharing backends
- Internal LDAP server, with AD semantics
- Internal Kerberos server, including PAC support
- fully asynchronous internals
- flexible process models
- better scalablilty from micro to very large installations
- new RPC infrastructure (PIDL)
- flexible database architecture (LDB)
- embedded scripting language (ejs)
- generic security subsystem (GENSEC)
- over 50% auto-generated code!
Step-by-step OpenLDAP Installation and Configuration
Easy steps for adding users:
1. Create unix user
2. Create unix user’s ldap passwd file
3. Convert passwd.file to ldif file
4. Add ldap file to LDAP Directory using ldapadd
Step #1. Requirements
compat-openldap.i386 0:2.1.30-6.4E
openldap-clients.i386 0:2.2.13-6.4E
openldap-devel.i386 0:2.2.13-6.4E
openldap-servers.i386 0:2.2.13-6.4E
openldap-servers-sql.i386 0:2.2.13-6.4E
You can install them using the command:
yum install *openldap* -y
Step #2. Start the service
[root@ldap ~]# chkconfig –levels 235 ldap on
[root@ldap ~]# service ldap start
Step #3. Create LDAP root user password
[root@ldap ~]# slappasswd
New password:
Re-enter new password:
{SSHA}cWB1VzxDXZLf6F4pwvyNvApBQ8G/DltW
[root@ldap ~]#
Step #4. Update /etc/openldap/slapd.conf for the root password
[root@ldap ~]# vi /etc/openldap/slapd.conf
#68 database bdb
#69 suffix "dc=adminmart,dc=com"
#70 rootdn "cn=Manager,dc=adminmart,dc=com"
#71 rootpw {SSHA}cWB1VzxDXZLf6F4pwvyNvApBQ8G/DltW
Step #5. Apply Changes
[root@ldap ~]# service ldap restart
Step #6. Create test users
[root@ldap ~]# useradd test1
[root@ldap ~]# passwd test1
Changing password for user test1.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
[root@ldap ~]# useradd test2
[root@ldap ~]# passwd test2
Changing password for user test2.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
[root@ldap ~]#
Note: Repeat the same for the rest of users
Step #7. Migrate local users to LDAP
[root@ldap ~]# grep root /etc/passwd > /etc/openldap/passwd.root
[root@ldap ~]# grep test1 /etc/passwd > /etc/openldap/passwd.test1
[root@ldap ~]# grep test2 /etc/passwd > /etc/openldap/passwd.test2
Note: Repeat the same for the rest of users
Step #8. Update default settings on file /usr/share/openldap/migration/migrate_common.ph
#71 $DEFAULT_MAIL_DOMAIN = "adminmart.com"; #74 $DEFAULT_BASE = "dc=adminmart,dc=com";
Step #9. Convert passwd.file to ldif (LDAP Data Interchange Format) file
[root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl /etc/openldap/passwd.root /etc/openldap/root.ldif
[root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl /etc/openldap/passwd.test1 /etc/openldap/test1.ldif
[root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl /etc/openldap/passwd.test2 /etc/openldap/test2.ldif
Note: Repeat the same for the rest of users
Step #10. Update root.ldif file for the “Manager” of LDAP Server
[root@ldap ~]# vi /etc/openldap/root.ldif
#1 dn: uid=root,ou=People,dc=adminmart,dc=com #2 uid: root #3 cn: Manager #4 objectClass: account
Step #11. Create a domain ldif file (/etc/openldap/adminmart.com.ldif)
[root@ldap ~]# cat /etc/openldap/adminmart.com.ldif
dn: dc=adminmart,dc=com dc: adminmart description: LDAP Admin objectClass: dcObject objectClass: organizationalUnit ou: rootobject dn: ou=People, dc=adminmart,dc=com ou: People description: Users of adminmart objectClass: organizationalUnit
Step #12. Import all users in to the LDAP
Add the Domain ldif file
[root@ldap ~]# ldapadd -x -D “cn=Manager,dc=adminmart,dc=com” -W -f /etc/openldap/adminmart.com.ldif
Enter LDAP Password:
adding new entry “dc=adminmart,dc=com”
adding new entry “ou=People, dc=adminmart,dc=com”
[root@ldap ~]#
Add the users:
[root@ldap ~]# ldapadd -x -D “cn=Manager,dc=adminmart,dc=com” -W -f /etc/openldap/root.ldif
Enter LDAP Password:
adding new entry “uid=root,ou=People,dc=adminmart,dc=com”
adding new entry “uid=operator,ou=People,dc=adminmart,dc=com”
[root@ldap ~]#
[root@ldap ~]# ldapadd -x -D “cn=Manager,dc=adminmart,dc=com” -W -f /etc/openldap/test1.ldif
Enter LDAP Password:
adding new entry “uid=test1,ou=People,dc=adminmart,dc=com”
[root@ldap ~]#
[root@ldap ~]# ldapadd -x -D “cn=Manager,dc=adminmart,dc=com” -W -f /etc/openldap/test2.ldif
Enter LDAP Password:
adding new entry “uid=test2,ou=People,dc=adminmart,dc=com”
[root@ldap ~]#
Note: Repeat the same for the rest of users
Step #13. Apply Changes
[root@ldap ~]# service ldap restart
Step #14. Test LDAP Server
It prints all the user information:
[root@ldap ~]# ldapsearch -x -b ‘dc=adminmart,dc=com’ ‘(objectclass=*)’