@Deepika Sunil
The error message you are seeing in FileZilla indicates that the connection to the server is timing out after 20 seconds of inactivity. This could be due to a number of reasons, such as network connectivity issues, firewall settings, or incorrect configuration settings.
Here are a few things you can try to troubleshoot the issue:
Check your network connectivity: Ensure that your network connection is stable and that there are no issues with your internet service provider. You can use tools like ping or traceroute to test the connectivity.
Check your firewall settings: Ensure that your firewall is not blocking the SFTP-SSH traffic. You may need to add a rule to allow SFTP-SSH traffic through your firewall as suggested by Jackson Martins
Check your configuration settings: Ensure that your SFTP-SSH configuration settings are correct. This includes settings such as the server address, port number, and authentication method.
Try using a different SFTP-SSH client: If you are still unable to connect using FileZilla, try using a different SFTP-SSH client to see if the issue is specific to FileZilla.
I hope this helps you troubleshoot the issue. If you have any further questions or need more information, please let me know.