FTP passive mode

[McWalt]

since i am using a router, I always connect ftp servers in passive mode. That seems to be slower (some connections don't even establish).
What can I do? I forwarded ports 21 and 8021 and still passive.

[zaphodiv]

FTP data connections often use port 20.
Port 21 is for the commands to get a file rarther than the content of the file.

Try forwarding port 20. Try looking at the session log in normal mode to see what port it is trying to use.