Since I changed to unlimited with the Genius hardware my FTP connection to a FTP server on a non standard high port number is failing.
My FTP client asks me for my login password and then fails with:
425 Sorry, invalid address given
I have tried Filezilla, CuteFTP and chrome. I think the initial connection on the FTP control port is happening but then something fails when opening the data ports. I have googled the error message and tried all kind of solutions, but nothing worked. Standard FTP on port 21 works for me. Tried passive, active and turned off all firewalls.
When I search the FTP server IP in the NAT mapping table of the genius I find entries like these:
Index Protocol Source IP Source Port Pseudo IP Pseudo Port Destination IP Destination Port
15 TCP PcIp 50676 MyExternalIp 50676 FtpServerIp 80
This to me looks like that my client tried to connect to the FTP server on port 50676 but for some reason that was changed to port 80. Is my interpretation correct?