How to solve FTP error prompt: 150 opening ASCII

We often encounter the following FTP error: 150 opening ASCII mode data connection for/bin/ls

What are the solutions?
426 Data Connection closed, transfer aborted.

This situation may be caused by the firewall (or proxy) installed in your network. The firewall (or proxy) prohibits remote connections. 426 Data Connection closed and transfer aborted indicate this. In this case, you can use the passive transmission mode (PASV mode) to avoid this restriction and transmit data.
The solution is to set it to passive mode PASV mode in site settings of the FTP tag. Similarly, if 200 PORT command successful appears in the front.
The above method is also used for connection failures.