thank you vbe and fpmurphy for your answers
@vbe
java has enough resources, 4gb for an ftp-server should be enough, maximum of 10 concurrent users
but I'll check this issue
and thanks for the tool, unfortunately it has no sftp support, just ftps
@fpmurphy
we moved because we wanted one single product with one administration interface.
vsftp was administrated from a http gui, mysql database, and openssh over local machine users. know that it's possible to use openldap for authentication for both, and perhaps we will do this
I've found another ftp-server that is capable of sftp with extension modules, the good old proftpd
any experiences on this?
cheers funksen
Edit:
got another requirement, grml
users must be able to change their passwords, over http interface or ftp directly, site command or something like that