Linux authentication with Active Directory using Kerberos 5

/home, Sweet /home

The home directories are configured in the line 20 of the smb.conf file shown in Listing 3: template homedir = /home/%D/%U. Samba will replace %D with the short domain name and %U with the domain user. The administrator can either create the directories individually for each user, or automate the process by calling the pam_mkhomedir module, which is part of the PAM distribution and is configured in the session section:

# /etc/pam.d/common-session
session required pam_mkhomedir.so silent skel=/etc/skel/ umask=0022
session sufficient pam_krb5.so
session required   pam_unix.so

This configuration tells the module to dynamically create missing home directories. The silent argument suppresses messages caused by copying from the skeleton directory. The last argument tells PAM to set the umask as the default for file and directory permissions to 0022. The setting allows programs running in the session to create directories with rwxr-xr-x and files with rw-r--r-- permissions.

As an alternative to local directories on kerberized clients, you could use home directories on a central file server. The PAM pam_mount.so module helps you do this. Any generic commands you want to run after the login procedure are added to the start scripts in /etc/profile.

Fully Integrated

Serveral steps are required to support Active Directory automated log in and home directories on a Linux client, but with Kerberos, NSS, PAM, and Samba, this integration project will help you stay friends with your neighbors in Redmond.

The Author

Walter Neu works as a system administrator for eurodata GmbH & Co. KG, Germany. He is a lecturer at the ASW – Berufsakademie Saarland University of cooperaive education, where he introduces computer science and economics students to Linux, Windows networking, and web server technologies.

Read full article as PDF:

028-034_ad-pam.pdf  (948.46 kB)

Related content

  • Likewise

    Likewise Open provides smooth integration with Active Directory environments. We show you how to install and configure the admin-friendly authentication system.

  • Samba 4

    Since the release of the final version, Samba 4 has become increasingly significant in IT practice; now it has found its way into Jessie, the next Debian release. We take a look at the new features.

  • FreeIPA

    FreeIPA offers integrated identity management and big ideas for the future.

  • Filter Proxy for AD

    You might want to reap the benefits of active directory’s single sign-on for your virus scanning and content filtering. If you also use Squid to handle user access to the internet, you have a front-row seat for “when worlds collide.”

  • Samba 4

    A technical preview version of Samba 4 became available at the end of January. We took a look at what’s coming in the next version of the Samba file and print service suite.

comments powered by Disqus

Direct Download

Read full article as PDF:

028-034_ad-pam.pdf  (948.46 kB)

News