In passive mode FTP, the FTP client initiates both connections to the server. ... This is a potential security issue and it isn't advisable to use the Passive mode of FTP. Note. All ResellerClub Windows and Linux web servers support both Active as well as Passive modes.

How does FTP passive mode work?

Passive Mode FTP

In passive mode, the client still initiates a command channel (control connection) to the server. However, instead of sending the PORT command, it sends the PASV command, which is basically a request for a server port to connect to for data transmission.

What is the difference between FTP active and passive mode?

Active vs Passive FTP

When an FTP connection is initiated, it begins with a control connection. ... In Passive Mode, the FTP server waits for the FTP client to send it a port and IP address to connect to. In Active mode, the server assigns a port and the IP address will be the same as the FTP client making the request.