How do I configure port/passive mode

[Aliuyanfeng]

Describe the bug
I want to be able to configure the port and passive mode of ftp

To Reproduce

func (p *FTPPool) newConnection() (*ftp.ServerConn, error) {
	conn, err := ftp.Dial(p.host, ftp.DialWithTimeout(5*time.Second), ftp.DialWithForceListHidden(true))
	if err != nil {
		return nil, err
	}
	err = conn.Login(p.username, p.password)
	if err != nil {
		return nil, err
	}
	return conn, nil
}

FTP server

• Name and version: vsftpd 3.0.2