How to authenticate Linux Clients using Domino server

Hi!

I want to use a Domino LDAP Server for authentication of Linux clients. 
Does anyone have a working setup for Linux clients?

I'm using Domino 6.5.1 do I have to extend the LDAP schema? Or is this
included? I did not find anything containing posix. How should I extend
the schema?  What happens when I register new users? How do I fill the
"new fields"  automatically?

Any help is appreciated,
  Andreas

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 Andreas Vetter
 Universitaet Wuerzburg, Theoretische Physik 1
 Am Hubland, 97074 Wuerzburg, Deutschland / Germany