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Start FileZilla (or any other client supporting FTPS).To test an FTPS connection, let’s use Filezilla.

So, you will have to open ports 21, 90-50100 (the range of ports you select) on the front firewall. FTP Server Passive (FTP Passive Traffic-In).The following rules are responsible for the incoming traffic in the Windows Firewall: The range is specified in the IIS site settings in FTP Firewall Support section.Īfter the range of ports has been changed, restart the service ( iisreset). In order not to open the whole range of TCP ports 1024-65535 to an FTPS server from outside, you can specify the range of used addresses for the FTP server. As the result, a firewall cannot determine, which port has to be opened for data transfer. When using protected FTPS connection, the transferred data are encrypted and not subject to analysis. Most firewalls allow to inspect FTP traffic, and after analyzing it, automatically open the necessary ports. For each data transfer channel, an individual TCP port is opened, which number is selected by a client or a server. When using FTP protocol, 2 different TCP connections are used, one is for command transfer and another is for data transfer. By default, SSL protection is mandatory and used to encrypt both management commands and transferred data. If each user must have their own FTP root folder, you can use the manual How to create an FTP server with user isolation.Ĭlick Finish in the wizard window.