I have a very basic FTP server running on Windows 10. Right now, I have no trouble accessing this server from my WLAN. However, when I try to connect from outside my network—using my public IP on port 21—I get an error message from Chrome, Windows Explorer, Mozzila, Filezilla, etc.
I’ve checked several times and port 21 is open using CanYouSeeme.org. Also, when I do a test on FTP test using my public IP on port 21 everything seems to be fine, I even get a directory listing of the files I currently have on the working directory.
What could be the issue?
Additional info: I added the rule for FTP on my firewall, but now firewall is turned off for both private and public networks.