fileZilla makes new connection when downloading a file from the server

[CJ van der Hoeven]

Using the latest filezilla: 3.53.1 on Windows 10:
Connecting to server : Ok
Clicking on remote directories : Ok, Shows directory contents.
Dragging a file from remote to local directory:

• Filezilla creates a new connection on the control channel.

This is probably not a problem on a real ftp server.
But I am debugging a tiny server on an ESP32 controller. And this controller can only handle a single client at the time. So it does not handle the new connect attempt while the primary connection is still active.

As a result, the new connect times-out, and the file download fails.

I wonder why Filezilla makes a new connection. Should it not continue with the existing connection?

[Tim Kosse]

FileZilla uses multiple connection so that you can still browse the server during an ongoing transfer.

You can limit connections to 1 in the Site Manager.