Paranoid Penguin - Authenticate with LDAP
Second, whenever I create a user record, I need to make sure that an objectclass: inetOrgPerson statement is present.
So, how do you create user records? Ideally, with the GUI of your choice. Last month I mentioned gq, which is a standard package in many distros; another excellent tool is ldapbrowser, available at www.iit.edu/~gawojar/ldap. Initially, however, you'll probably want to add at least your organizational entry manually, by creating an ldif file and writing it to the database via the ldapadd command. An ldif file is a text file containing a list of attribute/object class declarations, one per line; a simple one follows:
dn: dc=wiremonkeys,dc=org objectclass: top objectclass: organization o: Wiremonkeys of St. Paul
Here, we're defining the organization wiremonkeys.org. We specify its distinguished name, associate it with the object classes' top (mandatory for all records) and organization and specify the organization's name (Wiremonkeys of St. Paul), which is the only mandatory attribute for these two object classes.
To write this record to the database, issue this command:
bash-$ ldapadd -x -H ldaps://localhost/ \ -D "cn=ldapguy,dc=wiremonkeys,dc=org" \ -W -f wiremonkeys_init.ldif
As with most OpenLDAP commands, -x specifies simple password authentication, -H specifies the LDAP server's URL, -D specifies the DN of the administrator account and -W causes a prompt for the administrator's password. The -f option specifies the path to our ldif file.
Confused yet? I've packed a lot of information into this month's column, but our LDAP server is very nearly done. To finish yours without waiting for next month, see the OpenLDAP Administrator's Guide at www.openldap.org/doc for more information about TLS, startup flags, schema and ldif files.
Mick Bauer, CISSP, is Linux Journal's security editor and an IS security consultant for Upstream Solutions LLC in Minneapolis, Minnesota. Mick spends his copious free time chasing little kids (strictly his own) and playing music, sometimes simultaneously. Mick is author of Building Secure Servers With Linux (O'Reilly & Associates, 2002).
- March 2015 Issue of Linux Journal: System Administration
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- DNSMasq, the Pint-Sized Super Dæmon!
- Localhost DNS Cache
- Real-Time Rogue Wireless Access Point Detection with the Raspberry Pi
- Days Between Dates: the Counting
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- The Usability of GNOME
- Multitenant Sites
- Linux for Astronomers