hi, winscp gives me the following error message when i try to upload stuff to my server via ftp (tls explicit, tried active and passive mode): Lost Connection. Disconnected from server Copying files to remote side failed. when i click on "reconnect" (or just wait a little), the transfer resumes until it eventually completes. i followed the perfect server guide for debian, the server is a debian wheezy with ispconfig 188.8.131.52p6. locally i use a recent winscp version on a win8 machine. i've never had problems like this with other ftp servers. this is merely an inconvenience, but i'd like to keep my clients away from server error messages. i think it might be a problem with the firewall config. could you help me out (again)?