Dear Fabian.
Guillaume also looked at the fluxbb source and said that it should be easy to integrated ldap auth in fluxbb, so without having to modify the fluxbb source code itself (by using hooks) See his post on the fluxbb forum : http://fluxbb.org/forums/post/16062/#p16062 .. and Guillaume also agreed on the fact that because he knows fluxbb (and fluxbb developers very well), he could write such ldap_auth hook .. (and he proposed also to test the newbb -> fluxbb migration : see the tool he wrote for fluxbb here : http://www.punbb.fr/mods/mod.php?id=56 ) Can Guillaume have write script on the http://wiki.centos.org/WebsiteVer2/forums page ? his Wiki name should normally be GuillaumeKulakowski
FluxBB seems to be a fork of PunBB which is currently used on fr...org (Fabian, you was involved in this attempt I guess).
I am not sure if the Portal Software for FluxBB (which is also Puntal I guess) is still maintained and/or if there are any alternatives available. I am also not sure why a relatively small project like PunBB has been forked.
Maybe Guillaume could join the discussion to point that out.
Best Regards Marcus