How to understand how Mikrotik is blocking traffic?

Question

Mikrotik

There is no connection to any external FTP server from the local network. There are pings. As a router - Mikrotik, I tried to disable all the rules, I gave access to everything - there is no result. There is no connection in either active or passive mode. Various FTP clients have been tried.
How to understand how the connection is blocked on the router?

Answer 1

there is no connection to FTP servers in what mode? Active or passive?