New answers tagged ftps
FYI Installing this hotfix: https://support.microsoft.com/en-us/kb/2888853 helped. Lothar
You need enough data ports so that client IP - client random port - server data port combination uniquely identifies any FTP session (transfer). So in 10-users scenario, single data port is likely more than enough. You just need to make sure that no one steals the single port away from your FTP server, before it actually starts using it. As the server ...
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