[CentOS] using windows ad accounts for centos 5

Jay Leafey jay.leafey at mindless.com
Thu Jun 5 23:35:03 UTC 2008

Isaac Gonzalez wrote:
> Hi I read and used the article 
> http://blog.wazollc.com/Lists/Posts/Post.aspx?ID=2 to authenticate my ad 
> accounts when logging on to cent 5…however, once I edit the 
> nsswitch.conf file, I can’t even log on as root or any local users 
> anymore. Kinit seems to initialize fine doing a kinit 
> username at MYDOMAIN.COM <mailto:username at MYDOMAIN.COM> , however doing a 
> getent passwd adusername ….it just sits there in the shell and does 
> nothing. I actually had to put all files back to where they were before 
> the change to even be able to login locally or use sudo.
> I followed the steps line by line on this article but get stuck 
> everytime….anyone has an idea or a better documented way of achieving 
> what I am trying to do , please let me know.
> Thanks,
> Isaac

I'm using AD-via-Kerberos to authenticate users on several CentOS 5.1 
systems.  Setting it up was as easy as a single command line:

authconfig \
         --usemd5 --useshadow --enablelocauthorize \
         --enablekrb5 \
         --krb5realm={AD Domain Name} \
         --enablekrb5kdcdns --enablekrb5realmdns --update

This makes the necessary changes to /etc/krb5.conf, /etc/ and 
/etc/nsswitch.conf.  I am NOT using this for user information, just 
password authentication, so I add user accounts for each authorized user.

You can also consider using the --disablesysnetauth flag, which disables 
authenticating "system" accounts via the network services and forces 
them to use local authorization.  This should prevent entries in the AD 
for "root" and other system accounts from being used.

Hope that helps!
Jay Leafey - Memphis, TN
jay.leafey at mindless.com
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