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Troubleshooting FileZilla FTP Connection Errors

If you have problems connecting to your FTP account using FileZilla, check out the information below to help you solve the problem.

Response: 530 Login authentication failed

Response: 530 Login authentication failed
Error: Critical error
Error:  Could not connect to server

If you see this error message when trying to connect it means that you entered an incorrect username/password or host. If you don’t remember your login details, please follow the steps in this tutorial to reset it.

Your domain name must point to your hosting account. This happens by pointing your domain name’s DNS A record to your hosting account’s IP address.

Response: 421 Sorry, cleartext sessions are not accepted on this server

Response:    421 Sorry, cleartext sessions are not accepted on this server.
Error:    Could not connect to server

If you see this message, please check and make sure that FileZilla is set to use the following details:

Protocol: FTP protocol
Encryption: Require FTP over explicit TLS/SSL
LogonType : Normal

Filezilla timeout after 20 seconds of inactivity

  1. Open Site manager
  2. Click on “New site” button
  3. You need to change the Encryption to “Only use plain FTP (insecure)” and Logon type to Normal
  4. Enter host address, user name, and password and click “Connect”

Response: 500 unrecognized command

Response: 500 unrecognized command
Error:  Could not connect to server

This error can be caused by an incorrect port setting, please make sure you are using the correct port 21.

Response: 331 User savsuq2b1 OK. Password required

Error: Connetion timed out
Error: Could not connect to server

If you see this error you’ll first need to make sure that you’re using the correct login information. If they are all correct, you’ll need to check for Firewalls or Antivirus installed on your computer, try disabling them and test the connection again.

Response: Connection timed out (Failed to retrieve directory listing)

Error: Connection timed out after 10 seconds of inactivity
Error: Failed to retrieve directory listing

There could be a Firewalls or Antivirus problem, which might be blocking the transfer, try disabling them and test the connection again.

By default, FileZilla is defined to close the transfer of files if the file transfer takes more than a fixed amount of time, so if the disabling the Firewall doesn’t fix the problem you should try disabling the timeout settings.To disable the timeout select Edit -> Settings -> Connections -> Change Timeout to a higher value.

Connection attempt failed with “EAI_NONAME

Full error: Connection attempt failed with “EAI_NONAME – Neither nodename nor servname provided, or not known”.

If you see this error, this means that the issue is related to Name resolution error. The “Host” you are using is not correct, or your domain may not be pointed to our DNS. Check for spelling mistakes or try using the server’s IP address.



If you enjoyed this tutorial, then you’ll love our support! All ChemiCloud’s hosting plans include 24/7 support from our amazing support team. Check out our web hosting plans and have your website migrated today!

Updated on January 17, 2021

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  1. If want secure communications, you can follow these steps to turn on “FTP over TLS”:

    1. Run FileZilla app.

    2. Click “Edit > Settings” menu. You see the FileZilla Options screen.

    3. Click “FTP over TLS settings” on the left. You see details of “FTP over TLS settings”.

    4. Check “Enable FTP over TLS support (FTPS)”. Provide the private key file, certificate file and key password, if you have them.

    5. Or click “Generate new certificate” to generate a new self-signed certificate.

    6. Click OK to save changes.

    Try the above steps and let us know if this works!

  2. You appear to be behind a NAT router. Please configure the passive mode settings and forward a range of ports in your router.
    Warning: FTP over TLS is not enabled, users cannot securely log in.

    How do I fix this?

  3. Check if your useraccount isn’t locked or expired: chage -l username

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