The FTP client does not work with Mikrotik, everything is fine with the other router. What is missing on Mikrotik?

Question

FTP

There is an FTP server with an external IP and port 21, to which the FTP client (Total Commander) connects without problems and works properly (active mode). The router is changed to Mikrotik (on the client side) and the connection to the FTP server occurs, but the folders and files on the server are no longer visible, nothing can be downloaded / uploaded.

What settings should be added to Mikrotik at the client?

Answer 1

/ip firewall service-port set ftp disabled=no ports=21
/ip firewall nat add action=dst-nat chain=dstnat dst-port=21 in-interface=тут_указать_wan_интерфейс protocol=tcp to-addresses=адрес_FTP_сервера

Answer 2

there is still a passive FTP, add port forwarding 20. Just check