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It seems like the connection to the server at 212.192.127.21 was closed unexpectedly. This could be due to various reasons such as network issues, server configuration problems, or authentication errors.

You can try to troubleshoot the issue by checking the following:

1. Ensure that the server at 212.192.127.21 is reachable and running properly.
2. Verify that the username and password you are using for authentication are correct.
3. Check if there are any firewall rules blocking the connection.
4. Try connecting to the server again after some time in case it was a temporary issue.

If you continue to face issues, you may need to contact the server administrator for further assistance.