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Can not connect to the FTP (hosting) - Windows - port 21 issue

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Here is the weird problem I have. I suddenly can't connect to any of my 2 FTP (hosting servers) (port 21) through my Windows 10.

It took me two whole days now, and I just can't find out, where the problem lies!

This is what I did until now:

  • I opened the 21 port on the router (suspected router update...).
  • I opened the port 21 in the Windows Defender (in and out).
  • I deinstalled and reinstalled the firewall (Commodo) and tried without it and with a fresh installation.
  • I tried with the free FTP programs (Filezila, WinsSCP and Cyberduck) in active and passive mode.
  • Telnet result: Could not open connection to the host, on port 21: Connect failed

What the hell is going on??? What else can I try??


Tried with the port 20, tried over the phone WLAN as well, I got 20 sec timeout “error” and I tried to set timeout to 0 as well 200 sec. No connection, just a different “error”: Connection attempt failed with "ETIMEDOUT - Connection attempt timed out".


Tried with the port 20, tried over the phone WLAN which does not run over the service provider so the service provider. I got 20 sec timeout “error” and I tried to set timeout to 0 as well 200 sec. No connection, just a different “error”: Connection attempt failed with "ETIMEDOUT - Connection attempt timed out". Until now, I have managed to eliminate these options:

  • Service provider (same results over the Phone network)
  • Windows Defender Firewall (Ports 20,21 opened in and out)
  • Comodo Firewall (Deinstalled restarted, ran Comodo cleaner, restarted and tried without any kind of firewall etc.)
  • Router (opened port 20,21, disabled firewall)
  • Telnet can´t connect trough port 21
  • Tried 3 diferent FTP clients to connect to 2 different hosting servers and my own VPS. Same timeout results (Telnet...).

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