How open ftp port?

I have a server, and I would like to open ftp ports to use my server as a ftp server. How can I do it?
In MT is open port 21 for ftp, but I want to open other. Have I to open them as tcp or udp ports? In this case, which type must I put?

Thanks!

FTP is a TCP service and requires ports 20,21 (20 for data, 21 for command).

(2.9)
/ip firewall filter add chain=forward action=accept dst-address=aa.bb.cc.dd protocol=tcp dst-port=20-21 comment=“allow ftp to host”

(2.8.xx)
/ ip firewall rule forward
add action=accept dst-address=aa.bb.cc.dd protocol=tcp dst-port=20-21 comment=“allow ftp to host”

It may help to read the manual if you’re going to continue to use Mikrotik.