LDAP can be seen as a tree, with foo.com at the trunk. Branches are created as organizational units (ou), as shown in Figure 2.
Each entry in the directory is uniquely identified with a distinguished name (dn). The dn for the LDAP manager looks like dn: cn=manager, dc=foo, dc=com.
The ou provides a method for grouping entries, as shown in Table 1.
We create the individual entries in LDIF (LDAP Interchange Format) and save them to top.ldif:
dn: dc=foo, dc=com objectclass: dcObject objectclass: organization o: Foo Company dc: foo dn: cn=manager, dc=foo, dc=com objectclass: organizationalRole cn: manager dn: ou=people, dc=foo, dc=com ou: people objectclass: organizationalUnit objectclass: domainRelatedObject associatedDomain: foo.com dn: ou=contacts, ou=people, dc=foo, dc=com ou: contacts ou: people objectclass: organizationalUnit objectclass: domainRelatedObject associatedDomain: foo.com dn: ou=group, dc=foo, dc=com ou: group objectclass: organizationalUnit objectclass: domainRelatedObject
Add the top-level entries to the directory with ldapadd:
ldapadd -x -D 'cn=manager,dc=foo,dc=com' -W \ -f top.ldifThen, test your work with ldapsearch to retrieve all entries:
ldapsearch -x -b 'dc=foo,dc=com'
At this point, we have enough structure in LDAP to put it to real use. We'll start by sharing our e-mail contacts, which also should be in LDIF.
To simplify the process, you may be able to export your e-mail address book in LDIF. For example, in Mozilla 1.0, you can export in LDIF from the Tools menu on the address book window. Microsoft Outlook Express also allows exporting the address book in LDIF. You will need to process the resulting file so it looks like our contacts example below; I suggest using Perl for the task.
Contacts are uniquely identified by their e-mail addresses. Here is the dn for a sample contact:
dn: email@example.com,ou=contacts, ou=people, dc=foo,dc=com
With all of the attributes, the full entry for a contact looks like:
dn: firstname.lastname@example.org,ou=contacts, ou=people, dc=foo,dc=com cn: Someone Youknow mail: uid: givenname: Someone sn: Youknow objectclass: person objectClass: top objectClass: inetOrgPersonSeparate each contact entry with a blank line, and save it to a file called contacts.ldif. Then you can add the contacts to the directory with ldapadd:
ldapadd -x -D 'cn=manager,dc=foo,dc=com' -W \ -f contacts.ldifOnce again, test your work with an ldapsearch that retrieves all entries:
ldapsearch -x -b 'dc=foo,dc=com'
Now it's time to configure Mozilla to use the new LDAP server (see Figure 3).
From the Edit menu in the Mozilla Mail and News window, select Mail & Newsgroup Account Setting. In the Addressing tab, select Use a different LDAP server, then select Edit Directories and then Add. Fill in the Directory Server Properties dialog with:
Name: FOO Server: ldapserver.foo.com base DN: ou=people,dc=foo,dc=com
Next, tell Mozilla to look up addresses in your directory. Under Addressing in the Mail and Newsgroups preferences, select Address Autocompletion and fill in FOO for Directory Server.
Test your settings by composing a message to one of your contacts in your LDAP directory. The address should autocomplete as you type. Another test is to search the LDAP directory from within the Mozilla Mail Address Book. A search for Name or E-mail that contains * should return all of the contact entries. Similarly, you can also configure Microsoft Outlook Express to use the LDAP directory.
Fast/Flexible Linux OS Recovery
On Demand Now
In this live one-hour webinar, learn how to enhance your existing backup strategies for complete disaster recovery preparedness using Storix System Backup Administrator (SBAdmin), a highly flexible full-system recovery solution for UNIX and Linux systems.
Join Linux Journal's Shawn Powers and David Huffman, President/CEO, Storix, Inc.
Free to Linux Journal readers.Register Now!
- Server Hardening
- Zappix Visual IVR
- Are You Doing Something Extraordinary with Linux?
- Linaro Announces Software Reference Platform for ARM
- Kolab Systems AG and Collabora's CloudSuite
- AdaCore's SPARK Pro
- The Humble Hacker?
- The Death of RoboVM
- EnterpriseDB's EDB Postgres Advanced Server and EDB Postgres Enterprise Manager
- Compaq's Approach to Linux in Your Hand
In modern computer systems, privacy and security are mandatory. However, connections from the outside over public networks automatically imply risks. One easily available solution to avoid eavesdroppers’ attempts is SSH. But, its wide adoption during the past 21 years has made it a target for attackers, so hardening your system properly is a must.
Additionally, in highly regulated markets, you must comply with specific operational requirements, proving that you conform to standards and even that you have included new mandatory authentication methods, such as two-factor authentication. In this ebook, I discuss SSH and how to configure and manage it to guarantee that your network is safe, your data is secure and that you comply with relevant regulations.Get the Guide