Bug WinSCP TIME_WAIT

Hi,

I just noticed that WinSCP using FTPS Passive mode, is causing serious issues on our FTP server (FileZilla server 1.2.0)
Something goes wrong when closing the TCP socket for a PASV connection. All PASV ports on our server are in a TIME_WAIT state.
Eventually our server runs out of available PASV ports, and WinSCP can't download files anymore, until these TIME_WAIT states expire.
Tested this with FileZilla client, and no issues occurred. Same with CoffeeCup Free FTP, so the problem is definitely caused by WinSCP.

Please fix this.

Regards,
murdoch

I've just tested WinSCP 5.19.5 against FileZilla server 1.2, and I did not see any problems.
Please post verbose logs both from WinSCP and FileZilla server.

Though from your FileZilla forum post, it seem that you are having problem with other FTP clients too: https://forum.filezilla-project.org/viewtopic.php?t=54507