Active FTP via NAT, using non-standard port

[david]

Friends

I know that when I use an FTP client from within the NAT, and access an 
external FTP server,
all works with both active and passive provided the FTP server uses the 
standard port 21.

I also think it works just fine for passive mode if the FTP server uses a 
non-standard port.

I think it fails if in active mode if the FTP server uses a non-standard port.

I wonder if the guru's out there would:

1)  Confirm or correct my observations;

2)  Figure out how I can get to an FTP server using active when the server 
uses a
non-standard port.

Much thanks.

David