You can view listeners for webMethods.io MFT. Each listener is associated with a protocol port. Clients can connect to webMethods.io MFT through the configured listeners to transfer files and execute other commands, such as obtaining a directory listing.
When you activate a listener, webMethods.io MFT starts the listener and prepares for the file operations. When you deactivate a listener, webMethods.io MFT stops the listener.
To activate or deactivate a listener
On the navigation pane, select Listeners.
In the Running column, click the toggle button 
or 
to activate or deactivate the listener respectively.