Well, i can access the open-e Samba server via MacOS and W2008R2, so i think, usernames
and passwords are ok.

I don't know, how to enable plain passwords for Fedora systems (or Red Hat or Scientific
Linux). This is my problem. I want to test Samba access via our Linux clients.
(For MacOS this is easy, i need only a nsmb.conf file, but for Fedora i have
to change SecurityFlags and maybe other things.)