This is a howto based on fedora7 showing how to authenticate a K12LTSP  server off SME Server. The K12LTSP server is an easy way to add Linux thin client computing to your network. The K12LTSP Server is based on Fedora 6 with pre-configured LTSP  added in.
Install the K12LTSP Server
- Turn off the firewall
- Turn off SE Linux
- Log in as root
- Check /etc/hosts - make sure that the internal server name is different to your SME Server's name. I ran into trouble because the default K12LTSP internal server name is server.ltsp and my SME Server is server.school.edu.au - I changed the K12LTSP server's internal server name to k12server.ltsp. Note, this is different to the K12LTSP's external server name which you can set to be anything. Mine is k12.school.edu.au ! You probably won't have to do this step if you gave your SME Server a more imaginative name!
- Do a yum update. I ran into trouble with broken icewm (a really light window manager which I don't like anyway). So first do a yum remove icewm -y, and then yum update - y (I had to download around 450MB of updates, Fedora 6 is just a little old!)
- Reboot if you know what's good for ya!