as I read in TID 10064312 it's not possible to authenticate on a
reverse-proxy with https. (is it true yet?)

I changed 443 to 441 on BM-authentication and the reverse-proxy
accelerates public:443 to privat:443 webserver(NetStorage) and built
filter exceptions for 441 and 443.
But the BM-Login-Page never came up, there is a direct https-connection
to the webserver without authentication.

Is there a workaround to get both or some advice for a user-selection
process to the NetStorage-Site ?