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Unable to open port 21 for FTP

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  • Unable to open port 21 for FTP

    I am attempting to set up FTP access. This is on a Windows 2016 server. I have already installed FTP and went thru the basic configuration.
    I am using Filezilla to test the configuration and I am testing the connection on our LAN (not externally yet). I can only get it to work if I turn off the firewall on the server. This is not acceptable so I need to know what ports need to be opened or how I can specify the ports I want to use. With port 21 exempted it will make the connection but don't get the directory listing. After I get it to work locally I will need to configure the external firewall at that point. Someone, please give me some pointers on this.