I have setup a FTP behind the RT-N16 running "Tomato RAF v1.28.8650". I'm try to setup the FTP using explicit SSL/TLS. I setup the FTP on port 900 (forward the port from router to internal FTP server IP) and triggered ports 41000-42000 (trigger port is 900). But that does not work. The "open data connection" will fail (timed out). If I change ONLY the "triggered ports" to just basic "port forward", i.e. forward both port 900 and 41000-42000 to FTP server, then everything works fine. I thought the port forwarding is the preferred way with this kind application, is it? Am I missing something or there's issue with the Router "Port Forwarding" feature? Also, I enabled the "UPnP" and "Secure Mode" if that makes any difference. Thanks!