Notes on Kerberos / LDAP authentication

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Revision as of 14:06, 9 April 2009 by Jkh (Talk | contribs)

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This will be a scratch space for the beginning of new Kerberos & LDAP page. Initially, this will be a bunch of random notes, hopefully coalesced into a document.


Reference Documents

The main reference by Danang : Building Powerful Central Authentication

Things that can use Kerberos / LDAP to authenticate

These are the things that we would like to use our K&L auth:

  • NFS4 authentication/security
  • automount / autofs
  • sudo
  • ssh / kerberos key forwarding / ldap shared keys?
  • Apache web page security
  • Netgroups -- limiting logins to specific machines
  • AFS -- andrew file system
  • Email
  • radius / 802.1x for wired and wireless networks
  • Samba -- be able authenticate windows clients -- perhaps using pgina.
  • Mac OS/X clients?

First setup DNS

Kerberos and to a lesser extent LDAP need to have proper DNS names. If you are using an internal network (192.168.x.y), you will need to setup a DNS for your network.

The topic of DNS is very large. I'm not going to cover it here. I should point you to some external document.

I've found that on RHEL5/CentOS5 you can use system-config-bind. The help is good. I just imported the /etc/hosts file as suggested. This worked very well!

Also, one can use DNS service records to automatically find both the kerberos KDC and the ldap server.

Setting up Kerberos

yum -y install krb5-server

edit /etc/krb5.conf edit /var/kerberos/krb5kdc/kdc.conf

/usr/kerberos/sbin/kdb5_util create -s

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